When canceling the actionplan, the log cannot be printed normally

When I cancel an ongoing action plan, the watcher-applier log does not print properly：

2020-05-11 03:39:27.738 1 WARNING watcher.applier.workflow_engine.default [req-97485bde-2762-4833-92a8-c9d716e845c1 - - - - -] Aborting action: action_type:migrate uuid:f5cf4e5c-d37f-4eb7-86d6-08c27c56a5ec
2020-05-11 03:39:27.751 1 WARNING watcher.applier.workflow_engine.default [req-97485bde-2762-4833-92a8-c9d716e845c1 - - - - -] Aborting action: action_type:migrate uuid:04e10f3b-be00-4bb9-8a74-e19d77c88635
2020-05-11 03:39:31.729 1 ERROR watcher.common.exception [req-b6e4a74e-e0c2-4084-8e6d-706c5e867b7f - - - - -] Exception in string format operation: KeyError: u'uuid'
2020-05-11 03:39:31.729 1 ERROR watcher.common.exception Traceback (most recent call last):
2020-05-11 03:39:31.729 1 ERROR watcher.common.exception File "/usr/local/lib/python2.7/dist-packages/watcher/common/exception.py", line 82, in __init__
2020-05-11 03:39:31.729 1 ERROR watcher.common.exception message = self.msg_fmt % kwargs
2020-05-11 03:39:31.729 1 ERROR watcher.common.exception KeyError: u'uuid'
2020-05-11 03:39:31.729 1 ERROR watcher.common.exception
2020-05-11 03:39:31.730 1 ERROR watcher.common.exception [req-b6e4a74e-e0c2-4084-8e6d-706c5e867b7f - - - - -] code: 500
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default [req-b6e4a74e-e0c2-4084-8e6d-706c5e867b7f - - - - -] Action Plan with UUID %(uuid)s is cancelled by user: ActionPlanCancelled: Action Plan with UUID %(uuid)s is cancelled by user
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default Traceback (most recent call last):
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default File "/usr/local/lib/python2.7/dist-packages/watcher/applier/action_plan/default.py", line 57, in execute
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default applier.execute(self.action_plan_uuid)
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default File "/usr/local/lib/python2.7/dist-packages/watcher/applier/default.py", line 63, in execute
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default return self.engine.execute(actions)
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default File "/usr/local/lib/python2.7/dist-packages/watcher/applier/workflow_engine/default.py", line 99, in execute
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default raise exception.ActionPlanCancelled
2020-05-11 03:39:31.731 1 ERROR watcher.applier.action_plan.default ActionPlanCancelled: Action Plan with UUID %(uuid)s is cancelled by user