diff --git a/apps/system_manage/serializers/chat_user.py b/apps/system_manage/serializers/chat_user.py
index 33cef27f395..c7d91ffa3ad 100644
--- a/apps/system_manage/serializers/chat_user.py
+++ b/apps/system_manage/serializers/chat_user.py
@@ -38,8 +38,6 @@ def add_or_edit_user_group_relation(user, user_group_ids):
     if groups.count() != len(user_group_ids):
         raise AppApiException(500, _("Some user groups do not exist"))
 
-    UserGroupRelation.objects.bulk_create([UserGroupRelation(user=user, group=group) for group in groups])
-
 
 class ChatUserSerializer(serializers.Serializer):
     class UserInstance(serializers.Serializer):