I recently moved my media to a new drive (actually, I retired my 20+ yr old unRAID media server with an external drive directly attached to my PC and added cloud backup). I used the "Rename, Move, and Copy Files..." feature to point my database to a new location. That worked fine.
I also changed the 'File Location' in Options to the new location. And I configured Auto-Import to monitor the new location.
So now I have duplicate records of a lot of my audio tracks. The initial "Rename, Move, and Copy Files..." worked but I ended up with duplicate entries, possibly from the auto-import setting. It must not have recognized some of the media as already there. The original tracks have a few metadata fields that I added to help me create a few smartlists. I've added custom metadata fields for 'AMG Rating' and 'Date Recorded'. I provide this data whenever I rip/add media to my library. This way, a compilation that was released in 2019 but has a track that was originally recorded in 1968, will be included in a smartlist of music from the 60s. Without this addition, all of these tracks would use the date automatically gathered by the online databases, which is usually wrong for compilations.
When I compare the original to the duplicate I can see that the duplicate doesn't have data entered for my custom fields.
Is there a way I can easily delete these duplicates from my library? There are over 30,000 of them and it would be very tedious to do this manually.