diff --git a/module-admin/src/main/java/org/example/domain/board/controller/response/DetailBoardResponse.java b/module-admin/src/main/java/org/example/domain/board/controller/response/DetailBoardResponse.java
index ce8eb22c..d05471a4 100644
--- a/module-admin/src/main/java/org/example/domain/board/controller/response/DetailBoardResponse.java
+++ b/module-admin/src/main/java/org/example/domain/board/controller/response/DetailBoardResponse.java
@@ -60,7 +60,7 @@ public class DetailBoardResponse {
   private boolean myLikeYn;
 
   @Schema(description = "댓글 수")
-  private int replyCount;
+  private long replyCount;
 
   @Schema(description = "최종 저장 여부")
   private boolean saveYn;
diff --git a/module-admin/src/main/java/org/example/domain/board/repository/DetailBoardRepository.java b/module-admin/src/main/java/org/example/domain/board/repository/DetailBoardRepository.java
index c8628ca4..b2819dcc 100644
--- a/module-admin/src/main/java/org/example/domain/board/repository/DetailBoardRepository.java
+++ b/module-admin/src/main/java/org/example/domain/board/repository/DetailBoardRepository.java
@@ -2,6 +2,7 @@
 
 import static org.example.domain.board.QBoard.board;
 import static org.example.domain.board_like.QBoardLike.boardLike;
+import static org.example.domain.reply.QReply.reply;
 
 import com.querydsl.core.types.Projections;
 import com.querydsl.core.types.dsl.Expressions;
@@ -47,7 +48,14 @@ public DetailBoardResponse getBoard(Long boardId) {
                 boardLike.member.email.eq(SecurityUtils.getCurrentMemberEmail())
               ).exists()
             , "myLikeYn"),
-          board.replyList.size().as("replyCount"),
+          Expressions.as(
+            JPAExpressions
+              .select(reply.count())
+              .from(reply)
+              .where(
+                reply.board.eq(board),
+                reply.deleteYn.isFalse())
+            , "replyCount"),
           board.saveYn,
           board.fixYn,
           board.deleteYn
diff --git a/module-admin/src/main/java/org/example/domain/curriculum/controller/request/CreateCurriculumRequest.java b/module-admin/src/main/java/org/example/domain/curriculum/controller/request/CreateCurriculumRequest.java
index aeb30ad2..8297dc66 100644
--- a/module-admin/src/main/java/org/example/domain/curriculum/controller/request/CreateCurriculumRequest.java
+++ b/module-admin/src/main/java/org/example/domain/curriculum/controller/request/CreateCurriculumRequest.java
@@ -1,7 +1,6 @@
 package org.example.domain.curriculum.controller.request;
 
 import io.swagger.v3.oas.annotations.media.Schema;
-import jakarta.validation.constraints.NotBlank;
 import jakarta.validation.constraints.NotNull;
 
 @Schema(description = "커리큘럼 생성 요청 객체")
@@ -11,15 +10,12 @@ public record CreateCurriculumRequest(
   @Schema(description = "커리큘럼 대상 스터디 ID")
   Long studyId,
 
-  @NotBlank
   @Schema(description = "커리큘럼 제목")
   String title,
 
-  @NotNull
   @Schema(description = "커리큘럼 주차")
   Integer week,
 
-  @NotBlank
   @Schema(description = "커리큘럼 내용(에디터)")
   String content
 ) {
diff --git a/module-admin/src/main/java/org/example/domain/curriculum/service/CreateCurriculumService.java b/module-admin/src/main/java/org/example/domain/curriculum/service/CreateCurriculumService.java
index 6138cf68..437dc6e7 100644
--- a/module-admin/src/main/java/org/example/domain/curriculum/service/CreateCurriculumService.java
+++ b/module-admin/src/main/java/org/example/domain/curriculum/service/CreateCurriculumService.java
@@ -12,6 +12,7 @@
 import org.example.domain.study.service.CoreStudyService;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.StringUtils;
 
 @Service
 @RequiredArgsConstructor
@@ -26,6 +27,11 @@ public class CreateCurriculumService {
    * 커리큘럼 생성
    */
   public void createCurriculum(CreateCurriculumRequest request) {
+    if (!StringUtils.hasText(request.title()) || !StringUtils.hasText(request.content()))
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "제목 또는 내용이 비어있습니다.");
+    if (request.week() == null)
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "주차 선택은 필수입니다.");
+
     Study study = coreStudyService.findById(request.studyId());
     if (study.getType().equals(StudyType.TEMP)) {
       throw new GeneralException(ErrorStatus.BAD_REQUEST, "자율 스터디는 커리큘럼을 생성할 수 없습니다.");
@@ -45,6 +51,11 @@ public void createCurriculum(CreateCurriculumRequest request) {
    * 커리큘럼 수정
    */
   public void updateCurriculum(Long curriculumId, UpdateCurriculumRequest request) {
+    if (!StringUtils.hasText(request.title()) || !StringUtils.hasText(request.content()))
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "제목 또는 내용이 비어있습니다.");
+    if (request.week() == null)
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "주차 선택은 필수입니다.");
+
     Curriculum curriculum = coreCurriculumService.findById(curriculumId);
     Study study = null;
     if (request.studyId() != null) {
diff --git a/module-admin/src/main/java/org/example/domain/generation/service/CreateGenerationService.java b/module-admin/src/main/java/org/example/domain/generation/service/CreateGenerationService.java
index 257903b3..53adefca 100644
--- a/module-admin/src/main/java/org/example/domain/generation/service/CreateGenerationService.java
+++ b/module-admin/src/main/java/org/example/domain/generation/service/CreateGenerationService.java
@@ -89,6 +89,7 @@ public void renewGeneration(RenewGenerationRequest request) {
     memberRepository.initBlockYN();
     List<Study> regularStudyList = listStudyRepository.getOldGenerationStudyList(StudyType.REGULAR);
     for (Study oldStudy : regularStudyList) {
+      oldStudy.end();
       Study newStudy = Study.builder()
         .profileUrl(oldStudy.getProfileUrl())
         .name(oldStudy.getName())
diff --git a/module-admin/src/main/java/org/example/domain/inquiry/controller/response/DetailInquiryResponse.java b/module-admin/src/main/java/org/example/domain/inquiry/controller/response/DetailInquiryResponse.java
index d703798f..dd712236 100644
--- a/module-admin/src/main/java/org/example/domain/inquiry/controller/response/DetailInquiryResponse.java
+++ b/module-admin/src/main/java/org/example/domain/inquiry/controller/response/DetailInquiryResponse.java
@@ -43,7 +43,7 @@ public class DetailInquiryResponse {
   private String content;
 
   @Schema(description = "댓글 수")
-  private int replyCount;
+  private long replyCount;
 
   @Schema(description = "공개 여부")
   private boolean publicYn;
diff --git a/module-admin/src/main/java/org/example/domain/inquiry/repository/DetailInquiryRepository.java b/module-admin/src/main/java/org/example/domain/inquiry/repository/DetailInquiryRepository.java
index 475f3cad..ee85cb7b 100644
--- a/module-admin/src/main/java/org/example/domain/inquiry/repository/DetailInquiryRepository.java
+++ b/module-admin/src/main/java/org/example/domain/inquiry/repository/DetailInquiryRepository.java
@@ -2,8 +2,11 @@
 
 
 import static org.example.domain.inquiry.QInquiry.inquiry;
+import static org.example.domain.inquiry_reply.QInquiryReply.inquiryReply;
 
 import com.querydsl.core.types.Projections;
+import com.querydsl.core.types.dsl.Expressions;
+import com.querydsl.jpa.JPAExpressions;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import lombok.RequiredArgsConstructor;
 import org.example.domain.inquiry.controller.response.DetailInquiryResponse;
@@ -30,7 +33,14 @@ public DetailInquiryResponse getInquiry(Long inquiryId) {
         inquiry.member.profileUrl,
         inquiry.createdTime,
         inquiry.viewCount,
-        inquiry.replyList.size().as("replyCount"),
+        Expressions.as(
+          JPAExpressions
+            .select(inquiryReply.count())
+            .from(inquiryReply)
+            .where(
+              inquiryReply.inquiry.eq(inquiry),
+              inquiryReply.deleteYn.isFalse())
+          , "replyCount"),
         inquiry.publicYn,
         inquiry.solvedYn
       ))
diff --git a/module-admin/src/main/java/org/example/domain/institution/controller/request/CreateInstitutionRequest.java b/module-admin/src/main/java/org/example/domain/institution/controller/request/CreateInstitutionRequest.java
index 79ec3279..dc5899de 100644
--- a/module-admin/src/main/java/org/example/domain/institution/controller/request/CreateInstitutionRequest.java
+++ b/module-admin/src/main/java/org/example/domain/institution/controller/request/CreateInstitutionRequest.java
@@ -2,22 +2,17 @@
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import io.swagger.v3.oas.annotations.media.Schema.RequiredMode;
-import jakarta.validation.constraints.NotBlank;
-import jakarta.validation.constraints.NotNull;
 import org.example.domain.institution.enums.InstitutionType;
 
 @Schema(description = "기관 생성 요청 객체")
 public record CreateInstitutionRequest(
 
-  @NotBlank
   @Schema(description = "기관명", requiredMode = RequiredMode.REQUIRED)
   String name,
 
-  @NotNull
   @Schema(description = "기관 유형", requiredMode = RequiredMode.REQUIRED)
   InstitutionType type,
 
-  @NotBlank
   @Schema(description = "분석 내용", requiredMode = RequiredMode.REQUIRED)
   String content
 ) {
diff --git a/module-admin/src/main/java/org/example/domain/institution/service/CreateInstitutionService.java b/module-admin/src/main/java/org/example/domain/institution/service/CreateInstitutionService.java
index b991c351..dd802148 100644
--- a/module-admin/src/main/java/org/example/domain/institution/service/CreateInstitutionService.java
+++ b/module-admin/src/main/java/org/example/domain/institution/service/CreateInstitutionService.java
@@ -11,6 +11,7 @@
 import org.example.domain.workbook.repository.WorkbookRepository;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.util.StringUtils;
 
 @Service
 @RequiredArgsConstructor
@@ -25,8 +26,13 @@ public class CreateInstitutionService {
    * 기관 생성
    */
   public void createInstitution(CreateInstitutionRequest request) {
+    if (!StringUtils.hasText(request.name()) || !StringUtils.hasText(request.content()))
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "이름 또는 내용이 비어있습니다.");
+    if (request.type() == null)
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "주차 선택은 필수입니다.");
+
     if (institutionRepository.findByName(request.name()).isPresent()) {
-      throw new GeneralException(ErrorStatus.BAD_REQUEST, "이미 존재하는 기관명입니다.");
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "이미 존재하는 기관명입니다.");
     }
 
     institutionRepository.save(
@@ -42,6 +48,11 @@ public void createInstitution(CreateInstitutionRequest request) {
    * 기관 수정
    */
   public void updateInstitution(Long institutionId, UpdateInstitutionRequest request) {
+    if (!StringUtils.hasText(request.name()) || !StringUtils.hasText(request.content()))
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "이름 또는 내용이 비어있습니다.");
+    if (request.type() == null)
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "주차 선택은 필수입니다.");
+
     Institution institution = coreInstitutionService.findById(institutionId);
     institution.update(
       request.name(),
diff --git a/module-admin/src/main/java/org/example/domain/study/controller/request/CreateRegularStudyRequest.java b/module-admin/src/main/java/org/example/domain/study/controller/request/CreateRegularStudyRequest.java
index db998484..2c8414d8 100644
--- a/module-admin/src/main/java/org/example/domain/study/controller/request/CreateRegularStudyRequest.java
+++ b/module-admin/src/main/java/org/example/domain/study/controller/request/CreateRegularStudyRequest.java
@@ -1,7 +1,6 @@
 package org.example.domain.study.controller.request;
 
 import io.swagger.v3.oas.annotations.media.Schema;
-import jakarta.validation.constraints.NotBlank;
 
 @Schema(description = "정규 스터디 생성 요청 객체")
 public record CreateRegularStudyRequest(
@@ -9,11 +8,9 @@ public record CreateRegularStudyRequest(
   @Schema(description = "스터디 대표 이미지 URL")
   String profileUrl,
 
-  @NotBlank
   @Schema(description = "스터디 이름")
   String name,
 
-  @NotBlank
   @Schema(description = "내용(에디터)")
   String content
 
diff --git a/module-admin/src/main/java/org/example/domain/study/service/CreateStudyService.java b/module-admin/src/main/java/org/example/domain/study/service/CreateStudyService.java
index 1a164a63..e2a725ee 100644
--- a/module-admin/src/main/java/org/example/domain/study/service/CreateStudyService.java
+++ b/module-admin/src/main/java/org/example/domain/study/service/CreateStudyService.java
@@ -36,6 +36,9 @@ public class CreateStudyService {
    * 정규 스터디 생성
    */
   public void createRegularStudy(CreateRegularStudyRequest request) {
+    if (!StringUtils.hasText(request.name()) || !StringUtils.hasText(request.content()))
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "이름 또는 내용이 비어있습니다.");
+
     if (studyRepository.findByNameAndTypeIs(request.name(), StudyType.REGULAR).isPresent()) {
       throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "동일한 이름의 정규 스터디가 존재합니다.");
     }
@@ -56,6 +59,9 @@ public void createRegularStudy(CreateRegularStudyRequest request) {
    * 스터디 수정
    */
   public void updateStudy(Long studyId, UpdateStudyRequest request) {
+    if (!StringUtils.hasText(request.name()) || !StringUtils.hasText(request.content()))
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "이름 또는 내용이 비어있습니다.");
+
     Study study = coreStudyService.findById(studyId);
     if (study.getType().equals(StudyType.TEMP)) {
       throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "자율 스터디는 수정할 수 없습니다.");
diff --git a/module-admin/src/main/java/org/example/domain/week/controller/response/DetailWeekResponse.java b/module-admin/src/main/java/org/example/domain/week/controller/response/DetailWeekResponse.java
index d050b327..e1d18b95 100644
--- a/module-admin/src/main/java/org/example/domain/week/controller/response/DetailWeekResponse.java
+++ b/module-admin/src/main/java/org/example/domain/week/controller/response/DetailWeekResponse.java
@@ -1,5 +1,6 @@
 package org.example.domain.week.controller.response;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.time.LocalDateTime;
 import lombok.AllArgsConstructor;
@@ -14,6 +15,9 @@
 @Schema(description = "현재 주차 정보 응답 객체")
 public class DetailWeekResponse {
 
+  @JsonIgnore
+  private long weekId;
+
   @Schema(description = "현재 기수")
   private int generation;
 
diff --git a/module-admin/src/main/java/org/example/domain/week/repository/DetailWeekRepository.java b/module-admin/src/main/java/org/example/domain/week/repository/DetailWeekRepository.java
index bd25c061..6b719ec7 100644
--- a/module-admin/src/main/java/org/example/domain/week/repository/DetailWeekRepository.java
+++ b/module-admin/src/main/java/org/example/domain/week/repository/DetailWeekRepository.java
@@ -21,10 +21,11 @@ public class DetailWeekRepository {
   /**
    * 현재 주차 정보 조회
    */
-  public DetailWeekResponse getWeek() {
+  public DetailWeekResponse getCurrentWeek() {
     return queryFactory
       .select(Projections.fields(
           DetailWeekResponse.class,
+          week.id.as("weekId"),
           Expressions.as(
             JPAExpressions
               .select(
diff --git a/module-admin/src/main/java/org/example/domain/week/service/DetailWeekService.java b/module-admin/src/main/java/org/example/domain/week/service/DetailWeekService.java
index d1137e5a..a267380c 100644
--- a/module-admin/src/main/java/org/example/domain/week/service/DetailWeekService.java
+++ b/module-admin/src/main/java/org/example/domain/week/service/DetailWeekService.java
@@ -21,7 +21,7 @@ public class DetailWeekService {
    * 현재 주차 정보 조회
    */
   public DetailWeekResponse getWeek() {
-    DetailWeekResponse week = detailWeekRepository.getWeek();
+    DetailWeekResponse week = detailWeekRepository.getCurrentWeek();
     if (week == null) {
       Integer generation = generationRepository.findTopByOrderByValueDesc().getValue();
       throw new GeneralException(ErrorStatus.ATTENDANCE_ENDED, generation + "기 스터디 진행 기간이 아닙니다.");
diff --git a/module-admin/src/main/java/org/example/domain/workbook/service/CreateWorkbookService.java b/module-admin/src/main/java/org/example/domain/workbook/service/CreateWorkbookService.java
index 54cb6f22..5119e022 100644
--- a/module-admin/src/main/java/org/example/domain/workbook/service/CreateWorkbookService.java
+++ b/module-admin/src/main/java/org/example/domain/workbook/service/CreateWorkbookService.java
@@ -1,16 +1,20 @@
 package org.example.domain.workbook.service;
 
+import java.time.LocalDate;
 import lombok.RequiredArgsConstructor;
 import org.example.api_response.exception.GeneralException;
 import org.example.api_response.status.ErrorStatus;
 import org.example.domain.problem.Problem;
 import org.example.domain.problem.service.CoreProblemService;
+import org.example.domain.week.controller.response.DetailWeekResponse;
+import org.example.domain.week.repository.DetailWeekRepository;
 import org.example.domain.workbook.Workbook;
 import org.example.domain.workbook.controller.request.UpdateWorkbookRequest;
 import org.example.domain.workbook.repository.WorkbookRepository;
 import org.example.domain.workbook_problem.WorkbookProblem;
 import org.example.domain.workbook_problem.controller.request.CreateWorkbookProblemRequest;
 import org.example.domain.workbook_problem.repository.WorkbookProblemRepository;
+import org.example.util.DateUtils;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -24,6 +28,7 @@ public class CreateWorkbookService {
 
   private final WorkbookRepository workbookRepository;
   private final WorkbookProblemRepository workbookProblemRepository;
+  private final DetailWeekRepository detailWeekRepository;
 
 
   /**
@@ -46,11 +51,20 @@ public void deleteWorkbook(Long workbookId) {
    */
   public void createWorkbookProblem(Long workbookId, CreateWorkbookProblemRequest request) {
     Workbook workbook = coreWorkbookService.findById(workbookId);
+    DetailWeekResponse currentWeek = detailWeekRepository.getCurrentWeek();
+    if (workbook.getStudy().getEndYN() || // 종료된 스터디 수정 불가
+      !(workbook.getWeek().getId().equals(currentWeek.getWeekId()) // 현재 주차의 문제집이면서
+        && !DateUtils.isWeekend(LocalDate.now()) // 주말이 아니면서
+        && !workbook.getStudy().getEndYN() // 진행 중이면 수정 가능
+      )
+    )
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "스터디원에게 공개된 문제는 수정할 수 없습니다.");
+
     Problem problem = coreProblemService.findByNumber(request.number());
     if (workbookProblemRepository.findByWorkbookAndProblem(workbook, problem).isPresent()) {
       throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "이미 문제집에 포함된 문제입니다.");
     }
-    workbookProblemRepository.save(
+    workbook.getWorkbookProblemList().add(
       WorkbookProblem.builder()
         .workbook(workbook)
         .problem(problem)
@@ -62,6 +76,16 @@ public void createWorkbookProblem(Long workbookId, CreateWorkbookProblemRequest
    * 문제집 문제 삭제
    */
   public void deleteWorkbookProblem(Long workbookId, Integer problemNumber) {
-    workbookProblemRepository.deleteByWorkbookIdAndProblemNumber(workbookId, problemNumber);
+    Workbook workbook = coreWorkbookService.findById(workbookId);
+    DetailWeekResponse currentWeek = detailWeekRepository.getCurrentWeek();
+    if (workbook.getStudy().getEndYN() || // 종료된 스터디 삭제 불가
+      !(workbook.getWeek().getId().equals(currentWeek.getWeekId()) // 현재 주차의 문제집이면서
+        && !DateUtils.isWeekend(LocalDate.now()) // 주말이 아니면서
+        && !workbook.getStudy().getEndYN() // 진행 중이면 삭제 가능
+      )
+    )
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "스터디원에게 공개된 문제는 삭제할 수 없습니다.");
+
+    workbookProblemRepository.deleteByWorkbookAndProblemNumber(workbook, problemNumber);
   }
 }
diff --git a/module-core/src/main/java/org/example/domain/workbook_problem/repository/WorkbookProblemRepository.java b/module-core/src/main/java/org/example/domain/workbook_problem/repository/WorkbookProblemRepository.java
index b02dc381..4ceebe6b 100644
--- a/module-core/src/main/java/org/example/domain/workbook_problem/repository/WorkbookProblemRepository.java
+++ b/module-core/src/main/java/org/example/domain/workbook_problem/repository/WorkbookProblemRepository.java
@@ -10,7 +10,7 @@
 public interface WorkbookProblemRepository extends JpaRepository<WorkbookProblem, Long> {
 
   @Modifying
-  void deleteByWorkbookIdAndProblemNumber(Long workbookId, Integer number);
+  void deleteByWorkbookAndProblemNumber(Workbook workbook, Integer number);
 
   Optional<WorkbookProblem> findByWorkbookAndProblem(Workbook workbook, Problem problem);
 }
diff --git a/module-core/src/main/java/org/example/util/DateUtils.java b/module-core/src/main/java/org/example/util/DateUtils.java
index 82208700..f3599d0f 100644
--- a/module-core/src/main/java/org/example/util/DateUtils.java
+++ b/module-core/src/main/java/org/example/util/DateUtils.java
@@ -4,6 +4,8 @@
 import static java.time.temporal.ChronoUnit.HOURS;
 import static java.time.temporal.ChronoUnit.MINUTES;
 
+import java.time.DayOfWeek;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
 
 public class DateUtils {
@@ -24,4 +26,8 @@ public static String getUpdatedTime(LocalDateTime updatedTime) {
 
     return dayGap + "일 전";
   }
+
+  public static boolean isWeekend(LocalDate localDate) {
+    return (localDate.getDayOfWeek() == DayOfWeek.SATURDAY || localDate.getDayOfWeek() == DayOfWeek.SUNDAY);
+  }
 }
diff --git a/module-user/src/main/java/org/example/domain/board/controller/response/DetailBoardResponse.java b/module-user/src/main/java/org/example/domain/board/controller/response/DetailBoardResponse.java
index 761d1e1b..010f23bc 100644
--- a/module-user/src/main/java/org/example/domain/board/controller/response/DetailBoardResponse.java
+++ b/module-user/src/main/java/org/example/domain/board/controller/response/DetailBoardResponse.java
@@ -63,7 +63,7 @@ public class DetailBoardResponse {
     private boolean myLikeYn;
 
     @Schema(description = "댓글 수")
-    private int replyCount;
+    private long replyCount;
 
     @Schema(description = "최종 저장 여부")
     private boolean saveYn;
diff --git a/module-user/src/main/java/org/example/domain/board/repository/DetailBoardRepository.java b/module-user/src/main/java/org/example/domain/board/repository/DetailBoardRepository.java
index 9adde4ad..e731b62e 100644
--- a/module-user/src/main/java/org/example/domain/board/repository/DetailBoardRepository.java
+++ b/module-user/src/main/java/org/example/domain/board/repository/DetailBoardRepository.java
@@ -2,6 +2,7 @@
 
 import static org.example.domain.board.QBoard.board;
 import static org.example.domain.board_like.QBoardLike.boardLike;
+import static org.example.domain.reply.QReply.reply;
 
 import com.querydsl.core.types.Projections;
 import com.querydsl.core.types.dsl.Expressions;
@@ -40,7 +41,14 @@ public DetailBoardResponse getBoard(Long boardId) {
         board.saveYn,
         board.deleteYn,
         board.fixYn,
-        board.replyList.size().as("replyCount"),
+        Expressions.as(
+          JPAExpressions
+            .select(reply.count())
+            .from(reply)
+            .where(
+              reply.board.eq(board),
+              reply.deleteYn.isFalse())
+          , "replyCount"),
         board.boardLikeList.size().as("likeCount"),
         Expressions.as(
           JPAExpressions
diff --git a/module-user/src/main/java/org/example/domain/inquiry/controller/response/DetailInquiryResponse.java b/module-user/src/main/java/org/example/domain/inquiry/controller/response/DetailInquiryResponse.java
index a10dc999..86f40418 100644
--- a/module-user/src/main/java/org/example/domain/inquiry/controller/response/DetailInquiryResponse.java
+++ b/module-user/src/main/java/org/example/domain/inquiry/controller/response/DetailInquiryResponse.java
@@ -49,7 +49,7 @@ public class DetailInquiryResponse {
   private boolean myInquiryYn;
 
   @Schema(description = "댓글 수")
-  private int replyCount;
+  private long replyCount;
 
   @Schema(description = "공개 여부")
   private boolean publicYn;
diff --git a/module-user/src/main/java/org/example/domain/inquiry/repository/DetailInquiryRepository.java b/module-user/src/main/java/org/example/domain/inquiry/repository/DetailInquiryRepository.java
index 02d05d51..3f7c7c0a 100644
--- a/module-user/src/main/java/org/example/domain/inquiry/repository/DetailInquiryRepository.java
+++ b/module-user/src/main/java/org/example/domain/inquiry/repository/DetailInquiryRepository.java
@@ -2,8 +2,11 @@
 
 
 import static org.example.domain.inquiry.QInquiry.inquiry;
+import static org.example.domain.inquiry_reply.QInquiryReply.inquiryReply;
 
 import com.querydsl.core.types.Projections;
+import com.querydsl.core.types.dsl.Expressions;
+import com.querydsl.jpa.JPAExpressions;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import lombok.RequiredArgsConstructor;
 import org.example.domain.inquiry.controller.response.DetailInquiryResponse;
@@ -33,7 +36,14 @@ public DetailInquiryResponse getInquiry(Long inquiryId) {
         inquiry.createdTime,
         inquiry.viewCount,
         inquiry.member.email.eq(SecurityUtils.getCurrentMemberEmail()).as("myInquiryYn"),
-        inquiry.replyList.size().as("replyCount"),
+        Expressions.as(
+          JPAExpressions
+            .select(inquiryReply.count())
+            .from(inquiryReply)
+            .where(
+              inquiryReply.inquiry.eq(inquiry),
+              inquiryReply.deleteYn.isFalse())
+        , "replyCount"),
         inquiry.publicYn,
         inquiry.solvedYn
       ))
diff --git a/module-user/src/main/java/org/example/domain/inquiry/service/CreateInquiryService.java b/module-user/src/main/java/org/example/domain/inquiry/service/CreateInquiryService.java
index 9290979c..8d4bfc7a 100644
--- a/module-user/src/main/java/org/example/domain/inquiry/service/CreateInquiryService.java
+++ b/module-user/src/main/java/org/example/domain/inquiry/service/CreateInquiryService.java
@@ -65,6 +65,8 @@ public void updateInquiry(long inquiryId, UpdateInquiryRequest request) {
     Inquiry inquiry = coreInquiryService.findById(inquiryId);
     if (!inquiry.getMember().equals(coreMemberService.findByEmail(SecurityUtils.getCurrentMemberEmail())))
       throw new GeneralException(ErrorStatus.UNAUTHORIZED, "자신이 남긴 문의 이외에는 수정할 수 없습니다.");
+    if (inquiry.getSolvedYn())
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "답변이 등록된 문의는 수정할 수 없습니다.");
 
     inquiry.updateInquiry(
       request.category(),
@@ -93,7 +95,7 @@ public void deleteInquiry(long inquiryId) {
     if (!inquiry.getMember().equals(coreMemberService.findByEmail(SecurityUtils.getCurrentMemberEmail())))
       throw new GeneralException(ErrorStatus.BAD_REQUEST, "자신이 남긴 문의 이외에는 삭제할 수 없습니다.");
     if (inquiry.getSolvedYn())
-      throw new GeneralException(ErrorStatus.BAD_REQUEST, "답변이 등록된 문의는 삭제할 수 없습니다.");
+      throw new GeneralException(ErrorStatus.NOTICE_BAD_REQUEST, "답변이 등록된 문의는 삭제할 수 없습니다.");
 
     inquiryRepository.deleteById(inquiryId);
   }
diff --git a/module-user/src/main/java/org/example/domain/workbook/controller/WorkbookController.java b/module-user/src/main/java/org/example/domain/workbook/controller/WorkbookController.java
index 9fe30798..5eb06598 100644
--- a/module-user/src/main/java/org/example/domain/workbook/controller/WorkbookController.java
+++ b/module-user/src/main/java/org/example/domain/workbook/controller/WorkbookController.java
@@ -20,6 +20,13 @@ public class WorkbookController {
 
   private final WorkbookService workbookService;
 
+  @GetMapping("/auto")
+  @Operation(summary = "정규 스터디 문제집 생성(Scheduler 오류 시 실행)")
+  public ApiResponse<Void> createAutoWorkbook() {
+    workbookService.createAutoWorkbook();
+    return ApiResponse.onCreate();
+  }
+
   @GetMapping("/{workbook-id}")
   @LimitRegularStudyMember(page = true)
   @Operation(summary = "문제집 상세 조회")
diff --git a/module-user/src/main/java/org/example/domain/workbook/service/ListWorkbookService.java b/module-user/src/main/java/org/example/domain/workbook/service/ListWorkbookService.java
index 55f8025b..1ff763d0 100644
--- a/module-user/src/main/java/org/example/domain/workbook/service/ListWorkbookService.java
+++ b/module-user/src/main/java/org/example/domain/workbook/service/ListWorkbookService.java
@@ -1,9 +1,14 @@
 package org.example.domain.workbook.service;
 
+import java.time.LocalDate;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import org.example.api_response.exception.GeneralException;
 import org.example.api_response.status.ErrorStatus;
+import org.example.domain.week.Week;
+import org.example.domain.week.repository.DetailWeekRepository;
 import org.example.domain.workbook.controller.response.ListWorkbookDto;
 import org.example.domain.workbook.controller.response.ListWorkbookResponse;
 import org.example.domain.member.Member;
@@ -18,6 +23,7 @@
 import org.example.domain.workbook.repository.ListWorkbookRepository;
 import org.example.domain.workbook_problem.controller.response.ListWorkbookProblemDto;
 import org.example.domain.workbook_problem.repository.ListWorkbookProblemRepository;
+import org.example.util.DateUtils;
 import org.example.util.SecurityUtils;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -31,6 +37,7 @@ public class ListWorkbookService {
   private final CoreStudyService coreStudyService;
   private final ListWorkbookRepository listWorkbookRepository;
   private final ListWorkbookProblemRepository listWorkbookProblemRepository;
+  private final DetailWeekRepository detailWeekRepository;
   private final StudyMemberRepository studyMemberRepository;
 
   /**
@@ -43,13 +50,27 @@ public ListWorkbookResponse getWorkbookList(Long studyId) {
     }
     Member member = coreMemberService.findByEmail(SecurityUtils.getCurrentMemberEmail());
     if (studyMemberRepository.findByStudyAndMemberAndStatus(study, member, StudyMemberStatus.PASS).isEmpty()
-    && member.getRole().equals(Role.ROLE_USER)) {
+      && member.getRole().equals(Role.ROLE_USER)) {
       throw new GeneralException(ErrorStatus.NOTICE_UNAUTHORIZED, "스터디원만 열람할 수 있습니다.");
     }
 
+    if (DateUtils.isWeekend(LocalDate.now())) {
+      return ListWorkbookResponse.builder()
+        .workbookList(new ArrayList<>())
+        .build();
+    }
+
     List<ListWorkbookDto> workbookList = listWorkbookRepository.getWorkbookList(study);
+    Optional<Week> optionalWeek = detailWeekRepository.getCurrentWeek();
     for (ListWorkbookDto workbook : workbookList) {
+      // 스터디 진행 중인 경우, 현재 주차 모의테스트 문제는 주말이 아니면 비공개
+      if (optionalWeek.isPresent() && optionalWeek.get().getValue().equals(workbook.getWeek())
+        && !study.getEndYN()
+        && !DateUtils.isWeekend(LocalDate.now()))
+        continue;
+
       workbook.getProblemList().addAll(listWorkbookProblemRepository.getWorkbookProblemList(workbook.getWorkbookId()));
+
       // enum -> 티어 이미지 변환
       for (ListWorkbookProblemDto problem : workbook.getProblemList()) {
         problem.setLevelUrl(Level.valueOf(problem.getLevelUrl()));
diff --git a/module-user/src/main/java/org/example/domain/workbook/service/WorkbookService.java b/module-user/src/main/java/org/example/domain/workbook/service/WorkbookService.java
index 05eea1fb..b5899b1f 100644
--- a/module-user/src/main/java/org/example/domain/workbook/service/WorkbookService.java
+++ b/module-user/src/main/java/org/example/domain/workbook/service/WorkbookService.java
@@ -9,9 +9,17 @@
 @RequiredArgsConstructor
 public class WorkbookService {
 
+  private final CreateWorkbookService createWorkbookService;
   private final ListWorkbookService listWorkbookService;
   private final DetailWorkbookService detailWorkbookService;
 
+  /**
+   * 정규 스터디 모의테스트 생성
+   */
+  public void createAutoWorkbook() {
+    createWorkbookService.createAutoWorkbook();
+  }
+
   /**
    * 정규 스터디 모의테스트 조회
    */
diff --git a/module-user/src/main/java/org/example/schedule/SchedulerConfig.java b/module-user/src/main/java/org/example/schedule/SchedulerConfig.java
index 1957878f..a67e7652 100644
--- a/module-user/src/main/java/org/example/schedule/SchedulerConfig.java
+++ b/module-user/src/main/java/org/example/schedule/SchedulerConfig.java
@@ -29,9 +29,9 @@ public void createProblem() {
   }
 
   /**
-   * 매주 금요일 00:00 정규 스터디 문제집 생성
+   * 매주 목요일 00:00 정규 스터디 문제집 생성
    */
-  @Scheduled(cron = "0 0 0 * * FRI")
+  @Scheduled(cron = "0 0 0 * * THU")
   public void createAutoWorkbook() {
     log.info("=========문제집 생성 스케쥴러 실행=========");
     createWorkbookService.createAutoWorkbook();