diff --git a/todo/migrations/0004_backfill_user_role_data.py b/todo/migrations/0004_backfill_user_role_data.py
new file mode 100644
index 00000000..05edb770
--- /dev/null
+++ b/todo/migrations/0004_backfill_user_role_data.py
@@ -0,0 +1,138 @@
+# Generated by Django 5.1.5 on 2025-09-23 07:25
+
+from django.db import migrations
+import logging
+import sys
+from todo.repositories.user_role_repository import UserRoleRepository
+from todo.repositories.team_repository import TeamRepository, UserTeamDetailsRepository
+from todo.constants.role import RoleScope, RoleName
+from datetime import datetime, timezone
+from todo.services.enhanced_dual_write_service import EnhancedDualWriteService
+
+logger = logging.getLogger(__name__)
+
+
+def fix_team_roles(apps, schema_editor):
+    logger.info("\n--- Starting Team Roles Fix Script ---")
+    if "test" in sys.argv:
+        logger.info("\n--- Skipping Team Roles Fix Script in test environment ---")
+        return
+    teams_data = TeamRepository.get_collection().find({"is_deleted": False})
+    roles_scope = RoleScope.TEAM.value
+
+    roles_ensured = 0
+    roles_deactivated = 0
+    dual_write_service = EnhancedDualWriteService()
+
+    roles_to_assign = []
+    roles_to_remove = []
+    postgres_operations = []
+
+    for team in teams_data:
+        team_id = str(team["_id"])
+        team_owner = team["created_by"]
+        team_members = list(UserTeamDetailsRepository.get_by_team_id(team_id))
+        for member in team_members:
+            member_id = str(member.user_id)
+            if member_id == team_owner:
+                member_roles = UserRoleRepository.get_user_roles(member_id, roles_scope, team_id)
+                existing_roles = [role.role_name for role in member_roles]
+                for role in (RoleName.OWNER.value, RoleName.ADMIN.value, RoleName.MEMBER.value):
+                    if role not in existing_roles:
+                        roles_to_assign.append(
+                            {
+                                "user_id": member_id,
+                                "role_name": role,
+                                "scope": roles_scope,
+                                "team_id": team_id,
+                                "is_active": True,
+                                "created_at": datetime.now(timezone.utc),
+                                "created_by": "system",
+                            }
+                        )
+            else:
+                member_roles = UserRoleRepository.get_user_roles(member_id, roles_scope, team_id)
+                has_member_role = False
+                for role in member_roles:
+                    if role.role_name == RoleName.MEMBER.value:
+                        has_member_role = True
+                    else:
+                        roles_to_remove.append(
+                            {
+                                "mongo_id": role.id,
+                                "user_id": member_id,
+                                "role_name": role.role_name,
+                                "scope": roles_scope,
+                                "team_id": role.team_id,
+                                "is_active": role.is_active,
+                                "created_by": role.created_by,
+                                "created_at": role.created_at,
+                            }
+                        )
+                if not has_member_role:
+                    roles_to_assign.append(
+                        {
+                            "user_id": member_id,
+                            "role_name": RoleName.MEMBER.value,
+                            "scope": roles_scope,
+                            "team_id": team_id,
+                            "is_active": True,
+                            "created_at": datetime.now(timezone.utc),
+                            "created_by": "system",
+                        }
+                    )
+    if roles_to_assign:
+        result = UserRoleRepository.get_collection().insert_many(roles_to_assign)
+        roles_ensured = len(result.inserted_ids)
+        logger.info(f"Successfully inserted {roles_ensured} new roles.")
+
+        for role_data, mongo_id in zip(roles_to_assign, result.inserted_ids):
+            postgres_operations.append(
+                {
+                    "operation": "create",
+                    "collection_name": "user_roles",
+                    "mongo_id": str(mongo_id),
+                    "data": role_data,
+                }
+            )
+
+    if roles_to_remove:
+        for role in roles_to_remove:
+            mongo_id = str(role["mongo_id"])
+            postgres_operations.append(
+                {
+                    "operation": "update",
+                    "collection_name": "user_roles",
+                    "mongo_id": mongo_id,
+                    "data": {
+                        "user_id": role["user_id"],
+                        "role_name": role["role_name"],
+                        "scope": role["scope"],
+                        "team_id": role["team_id"],
+                        "is_active": False,
+                        "created_at": role["created_at"],
+                        "created_by": role["created_by"],
+                    },
+                }
+            )
+        role_ids_to_remove = [roles["mongo_id"] for roles in roles_to_remove]
+        result = UserRoleRepository.get_collection().update_many(
+            {"_id": {"$in": role_ids_to_remove}}, {"$set": {"is_active": False}}
+        )
+        roles_deactivated = result.modified_count
+        logger.info(f"Successfully deactivated {roles_deactivated} roles.")
+    if postgres_operations:
+        logger.info(f"\nStarting sync of {len(postgres_operations)} operations to PostgreSQL...")
+        success = dual_write_service.batch_operations(postgres_operations)
+        if success:
+            logger.info("PostgreSQL sync completed successfully.")
+        else:
+            logger.warning("PostgreSQL sync encountered errors. Check logs for details.")
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("todo", "0003_alter_postgresuserrole_unique_together_and_more"),
+    ]
+
+    operations = [migrations.RunPython(fix_team_roles, migrations.RunPython.noop)]