Fix column reorder with overlapping board access

backend/api/v1/tasks/viewsets/structure.py

@@ -176,7 +176,7 @@ class TaskColumnViewSet(viewsets.ModelViewSet):
             TaskBoard.objects.filter(
                 task_board_access_q(request.user),
                 is_archived=False,
-            ),
+            ).distinct(),
             pk=board_id,
         )
 

backend/tests/api/v1/tasks/test_tasks_api.py

@@ -1427,8 +1427,21 @@ def test_opening_board_marks_only_its_notifications_as_read(
 
 def test_board_member_reorders_columns_for_everyone(api_client, user):
     other_user = make_user("task-column-order@example.com", "+79994440093")
+    first_department = Department.objects.create(name="Первый отдел порядка")
+    second_department = Department.objects.create(name="Второй отдел порядка")
+    EmployeeDepartment.objects.create(
+        employee=other_user,
+        department=first_department,
+        is_active=True,
+    )
+    EmployeeDepartment.objects.create(
+        employee=other_user,
+        department=second_department,
+        is_active=True,
+    )
     board = TaskBoard.objects.create(name="Общий порядок", created_by=user)
     board.members.add(user, other_user)
+    board.departments.add(first_department, second_department)
     first = TaskColumn.objects.create(
         board=board,
         name="Первая",