Playlists broken when Library Moved to another disk drive

Problem: Manually created playlists do not update the drive when moving Audirvana Library to a new drive. Manually created Playlists appear empty.

As my Macintosh HD is filling up, I need to move the Audirvana Library to an external drive. I moved the library and performed a resync. All Smart Playlists work and all tracks/albums appear just fine however the manually created playlists are empty. Is there some method of resolving this so that I don’t have to recreate them which took a lot of work in the first place.

Thanks

Have you tried exporting them, then reimporting them to new place?