diff --git a/src/backend/base/langflow/api/v1/chat.py b/src/backend/base/langflow/api/v1/chat.py
index df4aeb294..031772852 100644
--- a/src/backend/base/langflow/api/v1/chat.py
+++ b/src/backend/base/langflow/api/v1/chat.py
@@ -172,7 +172,6 @@ async def build_vertex(
                 artifacts,
                 vertex,
             ) = await graph.build_vertex(
-                lock=lock,
                 chat_service=chat_service,
                 vertex_id=vertex_id,
                 user_id=current_user.id,