diff --git a/addons/mrp/migrations/13.0.2.0/post-migration.py b/addons/mrp/migrations/13.0.2.0/post-migration.py
index 7d7e2b50ae28..03e4ca49b5d0 100644
--- a/addons/mrp/migrations/13.0.2.0/post-migration.py
+++ b/addons/mrp/migrations/13.0.2.0/post-migration.py
@@ -2,12 +2,18 @@
 # Copyright 2020 Andrii Skrypka <andrijskrypa@ukr.net>
 # Copyright 2020 ForgeFlow <http://www.forgeflow.com>
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-from openupgradelib import openupgrade
+from openupgradelib import openupgrade, openupgrade_90
 
 _unlink_by_xmlid = [
     'mrp.sequence_mrp_unbuild',
 ]
 
+attachment_fields = {
+    'mrp.routing.workcenter': [
+        ('worksheet', None),
+    ],
+}
+
 
 def fill_bom_product_template_attribute_value(env):
     openupgrade.logged_query(env.cr, """
@@ -292,3 +298,4 @@ def migrate(env, version):
     enable_group_mrp_byproducts(env)
     generate_wo_line(env)
     fill_planned_datetime(env)
+    openupgrade_90.convert_binary_field_to_attachment(env, attachment_fields)
diff --git a/addons/mrp/migrations/13.0.2.0/pre-migration.py b/addons/mrp/migrations/13.0.2.0/pre-migration.py
index 7abb9f5c998e..b16413de9f22 100644
--- a/addons/mrp/migrations/13.0.2.0/pre-migration.py
+++ b/addons/mrp/migrations/13.0.2.0/pre-migration.py
@@ -23,6 +23,9 @@
     'stock_move_line': [
         ('lot_produced_id', None),
     ],
+    'mrp_routing_workcenter': [
+        ('worksheet', None),
+    ],
 }
 
 _column_copies = {