diff --git a/addons/mymach_fleet_intelligence/models/res_users.py b/addons/mymach_fleet_intelligence/models/res_users.py
index 4065875..11891c0 100644
--- a/addons/mymach_fleet_intelligence/models/res_users.py
+++ b/addons/mymach_fleet_intelligence/models/res_users.py
@@ -40,11 +40,15 @@ class ResUsers(models.Model):
         if not group_user or not group_manager:
             return
 
-        # Önce ikisini de kaldır
-        self.groups_id = [(3, group_user.id), (3, group_manager.id)]
+        # Önce ikisini de kaldıracak komutlar
+        groups_cmd = [(3, group_user.id), (3, group_manager.id)]
 
         # Seçime göre yeniden ekle
         if self.mymach_role == 'user':
-            self.groups_id = [(4, group_user.id)]
+            groups_cmd.append((4, group_user.id))
         elif self.mymach_role == 'manager':
-            self.groups_id = [(4, group_manager.id), (4, group_user.id)]
+            groups_cmd.append((4, group_manager.id))
+            groups_cmd.append((4, group_user.id))
+
+        # Doğrudan özellik ataması AttributeError yapabilir, write() ile M2M güncelleyelim
+        self.sudo().write({'groups_id': groups_cmd})