diff --git a/src/daemon/ticker.py b/src/daemon/ticker.py
index d3da121..a4f2198 100644
--- a/src/daemon/ticker.py
+++ b/src/daemon/ticker.py
@@ -1307,8 +1307,8 @@ Parent Task ID: {parent_task.id}
                 pass
 
         # v2.7.2: 进程存活性检查 — counter 占用但进程已死的兜底
-        if self.spawner and self.counter:
-            for agent_id in list(self.counter.active_agents.keys()):
+        if self.spawner and self.counter and hasattr(self.counter, "active_agents"):
+            for agent_id in list(self.counter.active_agents.keys()) if hasattr(self.counter, "active_agents") else []:
                 session_info = self.spawner.get_session_by_agent(agent_id)
                 if not session_info:
                     continue