diff --git a/jiuwen/core/component/questioner_comp.py b/jiuwen/core/component/questioner_comp.py
index a40c223c0f77a5c40b921b2f9e10021c1ffd6e32..74f453bbc03cc95b1f9deb7649bc3e72b76ed531 100644
--- a/jiuwen/core/component/questioner_comp.py
+++ b/jiuwen/core/component/questioner_comp.py
@@ -407,7 +407,7 @@ class QuestionerExecutable(Executable):
         tracer = context.tracer()
         if tracer:
             await tracer.trigger("tracer_workflow", "on_invoke",
-                                 invoke_id=context.executable_id, parent_node_id=context.parent_id,
+                                 invoke_id=context.executable_id(), parent_node_id=context.parent_id(),
                                  on_invoke_data={"on_invoke_data": "extra trace data"})
 
         state_from_context = self._load_state_from_context(context)
diff --git a/jiuwen/core/tracer/tracer.py b/jiuwen/core/tracer/tracer.py
index 647d2ea8f43f1a32153644b973dfcd19b552b23a..2dba8b97b7e4a7fcf544568c31408dde4a00376a 100644
--- a/jiuwen/core/tracer/tracer.py
+++ b/jiuwen/core/tracer/tracer.py
@@ -19,7 +19,7 @@ class Tracer:
         parent_tracer_workflow_span_manager = SpanManager(self._trace_id)
         trace_workflow_handler = TraceWorkflowHandler(callback_manager, stream_writer_manager,
                                                       parent_tracer_workflow_span_manager)
-        self.tracer_workflow_span_manager_dict[None] = parent_tracer_workflow_span_manager
+        self.tracer_workflow_span_manager_dict[""] = parent_tracer_workflow_span_manager
         callback_manager.register_handler({TracerHandlerName.TRACE_AGENT.value: trace_agent_handler})
         callback_manager.register_handler({TracerHandlerName.TRACER_WORKFLOW.value: trace_workflow_handler})
         self._callback_manager = callback_manager