diff --git a/api/apps/kb_app.py b/api/apps/kb_app.py
index d65766b83..9c37f96b4 100644
--- a/api/apps/kb_app.py
+++ b/api/apps/kb_app.py
@@ -107,7 +107,7 @@ def update():
 
         if req["name"].lower() != kb.name.lower() \
                 and len(
-            KnowledgebaseService.query(name=req["name"], tenant_id=current_user.id, status=StatusEnum.VALID.value)) > 1:
+            KnowledgebaseService.query(name=req["name"], tenant_id=current_user.id, status=StatusEnum.VALID.value)) >= 1:
             return get_data_error_result(
                 message="Duplicated knowledgebase name.")