diff --git a/api/core/app/apps/workflow/generate_task_pipeline_fast.py b/api/core/app/apps/workflow/generate_task_pipeline_fast.py
index e95f8176f9..82cf7f401a 100644
--- a/api/core/app/apps/workflow/generate_task_pipeline_fast.py
+++ b/api/core/app/apps/workflow/generate_task_pipeline_fast.py
@@ -239,7 +239,7 @@ class WorkflowAppGenerateTaskPipelineFast:
 
                 # init workflow run
                 workflow_run = self._workflow_cycle_manager._handle_workflow_run_start_fast(
-                    session=session,
+                    session=None,
                     workflow_id=self._workflow_id,
                     user_id=self._user_id,
                     created_by_role=self._created_by_role,