diff --git a/src/daemon/dispatcher.py b/src/daemon/dispatcher.py
index 2ad8943..5351dbc 100644
--- a/src/daemon/dispatcher.py
+++ b/src/daemon/dispatcher.py
@@ -243,9 +243,8 @@ class Dispatcher:
                 }
             except AgentBusyError:
                 # v2.7.2: agent 被 counter 占用或冷却中
-                # v2.7.3: Mail spawn 失败时回退 working → pending
-                if is_mail and db_path:
-                    self._mail_revert_to_pending(task.id, db_path)
+                # v2.7.3: on_checks_passed 在 check 通过后才标 working，
+                # 所以 AgentBusyError 时 working 未被标记，无需回退
                 self._record_routing(task, decision, "skipped", "Agent busy", _routing_db)
                 return {
                     "level": level.value,
@@ -255,9 +254,6 @@ class Dispatcher:
                     "reason": "Agent busy (concurrent limit or cooling down)",
                 }
             except Exception as e:
-                # v2.7.3: Mail spawn 异常时也回退 working → pending
-                if is_mail and db_path:
-                    self._mail_revert_to_pending(task.id, db_path)
                 self._record_routing(task, decision, "error", str(e), _routing_db)
                 return {
                     "level": level.value,