diff --git a/apps/application/serializers/common.py b/apps/application/serializers/common.py
index a1ff948a4..014c972b9 100644
--- a/apps/application/serializers/common.py
+++ b/apps/application/serializers/common.py
@@ -22,7 +22,6 @@ from common.exception.app_exception import ChatException
 from knowledge.models import Document
 from models_provider.models import Model
 from models_provider.tools import get_model_credential
-from system_manage.models import UserGroupRelation
 
 
 class ChatInfo: