How to recover mongodb error in rhui ?

Issue

• How to recover mongodb error in rhui ?

root@server ~]# pulp-migrate
removing persisted tasks
Traceback (most recent call last):
  File "/usr/bin/pulp-migrate", line 23, in <module>
    sys.exit(script.main())
  File "/usr/lib/python2.6/site-packages/pulp/server/db/migrate/script.py", line 131, in main
    drop_snapshots()
  File "/usr/lib/python2.6/site-packages/pulp/server/db/migrate/script.py", line 67, in drop_snapshots
    collection.remove(safe=True)
  File "/usr/lib/python2.6/site-packages/pulp/server/db/connection.py", line 80, in retry
    return method(*args, **kwargs)
  File "/usr/lib64/python2.6/site-packages/pymongo/collection.py", line 436, in remove
    message.delete(self.__full_name, spec_or_id, safe, kwargs), safe)
  File "/usr/lib64/python2.6/site-packages/pymongo/connection.py", line 642, in _send_message
    return self.__check_response_to_last_error(response)
  File "/usr/lib64/python2.6/site-packages/pymongo/connection.py", line 613, in __check_response_to_last_error
    raise OperationFailure(error["err"], error["code"])
pymongo.errors.OperationFailure: Invalid BSONObj size: -286331154 (0xEEEEEEEE) first element: _id: "465d75a4-e582-4fe3-844b-e862d58f1469"