The PurgeScheduleHistoryQueue is used by external vaulting and replication to track and clean up information about the old (outdated) schedules for revaulting and content replication. The queue contains only one object at any time.

A failed queue entry is an indication that old schedule histories could not be removed.

Checking for failed entries in this queue is not necessary. If the entry in the queue is in the failed state, it will be recreated during the next startup of the method server.