diff --git a/litellm/proxy/management_endpoints/access_group_endpoints.py b/litellm/proxy/management_endpoints/access_group_endpoints.py
index 53dfbcda83..d58dca5aec 100644
--- a/litellm/proxy/management_endpoints/access_group_endpoints.py
+++ b/litellm/proxy/management_endpoints/access_group_endpoints.py
@@ -392,7 +392,7 @@ async def update_access_group(
     update_fields = data.model_dump(exclude_unset=True)
     update_data: dict = {"updated_by": user_api_key_dict.user_id}
     for field, value in update_fields.items():
-        if field in ("assigned_team_ids", "assigned_key_ids") and value is None:
+        if field in ("assigned_team_ids", "assigned_key_ids", "access_model_names", "access_mcp_server_ids", "access_agent_ids") and value is None:
             value = []
         update_data[field] = value