Device Library Is Corrupted

My USB disc is not working in the MAC&PC rekordbox 5.8.2 , error message with 'device library is corrupted'. The thing is I can still play on XDJ1000 since USB disc loads normally there but I cannot manage it via Rekordbox on MAC&PC rekordbox 5.8.2.// I am not able to restore all my playlists since I was making them right in the USB disc and on a lot of computers, not only mine so it is hard to build it all once again. I really would like to access the USB on the Computer, I know it has something to do with "export.pdb" file on the USB disc since once I delete that, error message is gone but as well all my playlists. Please help!