diff --git a/api/core/workflow/workflow_cycle_manager.py b/api/core/workflow/workflow_cycle_manager.py
index e4ed329bf6..9006c5495e 100644
--- a/api/core/workflow/workflow_cycle_manager.py
+++ b/api/core/workflow/workflow_cycle_manager.py
@@ -80,7 +80,6 @@ class WorkflowCycleManager:
         workflow_execution_repository: WorkflowExecutionRepository,
         workflow_node_execution_repository: WorkflowNodeExecutionRepository,
     ) -> None:
-        self._workflow_run: WorkflowRun | None = None
         self._application_generate_entity = application_generate_entity
         self._workflow_system_variables = workflow_system_variables
         self._workflow_execution_repository = workflow_execution_repository