how to recover deleted history?
Go to your Saved Histories, from the History gear menu or the User masthead menu.
Click on Advanced Search and choose status = “all”. All histories will be listed: active, deleted, or permanently deleted
Click on the target history’s menu and choose “undelete”.
Note: Any history that is “deleted” can be “undeleted”, but once a history is “permanently deleted” (purged) it cannot be recovered.