diff --git a/.changeset/little-dodos-boil.md b/.changeset/little-dodos-boil.md
new file mode 100644
index 0000000000..7196d0a456
--- /dev/null
+++ b/.changeset/little-dodos-boil.md
@@ -0,0 +1,6 @@
+---
+'@aws-amplify/client-config': major
+'@aws-amplify/platform-core': major
+---
+
+removes username from username_attribute
diff --git a/packages/client-config/API.md b/packages/client-config/API.md
index 8eb03d2361..b8c8d9d07e 100644
--- a/packages/client-config/API.md
+++ b/packages/client-config/API.md
@@ -91,7 +91,7 @@ interface AWSAmplifyBackendOutputs {
             response_type: 'code' | 'token';
         };
         standard_required_attributes?: AmazonCognitoStandardAttributes[];
-        username_attributes?: ('email' | 'phone_number' | 'username')[];
+        username_attributes?: ('email' | 'phone_number')[];
         user_verification_types?: ('email' | 'phone_number')[];
         unauthenticated_identities_enabled?: boolean;
         mfa_configuration?: 'NONE' | 'OPTIONAL' | 'REQUIRED';
@@ -208,7 +208,7 @@ export type CustomClientConfig = {
 export const DEFAULT_CLIENT_CONFIG_VERSION: ClientConfigVersion;
 
 // @public
-export const generateClientConfig: <T extends "1" | "0">(backendIdentifier: DeployedBackendIdentifier, version: T, awsClientProvider?: AWSClientProvider<{
+export const generateClientConfig: <T extends "0" | "1">(backendIdentifier: DeployedBackendIdentifier, version: T, awsClientProvider?: AWSClientProvider<{
     getS3Client: S3Client;
     getAmplifyClient: AmplifyClient;
     getCloudFormationClient: CloudFormationClient;
diff --git a/packages/client-config/src/client-config-schema/client_config_v1.ts b/packages/client-config/src/client-config-schema/client_config_v1.ts
index 02c85aff6c..7bd851a323 100644
--- a/packages/client-config/src/client-config-schema/client_config_v1.ts
+++ b/packages/client-config/src/client-config-schema/client_config_v1.ts
@@ -142,7 +142,7 @@ export interface AWSAmplifyBackendOutputs {
      *
      * @minItems 1
      */
-    username_attributes?: ('email' | 'phone_number' | 'username')[];
+    username_attributes?: ('email' | 'phone_number')[];
     user_verification_types?: ('email' | 'phone_number')[];
     unauthenticated_identities_enabled?: boolean;
     mfa_configuration?: 'NONE' | 'OPTIONAL' | 'REQUIRED';
diff --git a/packages/client-config/src/client-config-schema/schema_v1.json b/packages/client-config/src/client-config-schema/schema_v1.json
index 46b6ad5fac..3544d0ab0d 100644
--- a/packages/client-config/src/client-config-schema/schema_v1.json
+++ b/packages/client-config/src/client-config-schema/schema_v1.json
@@ -157,7 +157,7 @@
           "type": "array",
           "items": {
             "type": "string",
-            "enum": ["email", "phone_number", "username"]
+            "enum": ["email", "phone_number"]
           },
           "minItems": 1,
           "uniqueItems": true
diff --git a/packages/platform-core/API.md b/packages/platform-core/API.md
index d257509bf4..290f4c8921 100644
--- a/packages/platform-core/API.md
+++ b/packages/platform-core/API.md
@@ -158,12 +158,12 @@ export const packageJsonSchema: z.ZodObject<{
     type: z.ZodOptional<z.ZodUnion<[z.ZodLiteral<"module">, z.ZodLiteral<"commonjs">]>>;
 }, "strip", z.ZodTypeAny, {
     name?: string | undefined;
-    type?: "module" | "commonjs" | undefined;
     version?: string | undefined;
+    type?: "module" | "commonjs" | undefined;
 }, {
     name?: string | undefined;
-    type?: "module" | "commonjs" | undefined;
     version?: string | undefined;
+    type?: "module" | "commonjs" | undefined;
 }>;
 
 // @public