Apple Music Library on MacBook Pro - Index Corrupted?
I have an M1 Pro MacBook Pro running Sonoma 14.1.1. The Apple Music app is version 1.4.1.29. Settings include having "Keep Music Media folder organized" and "Copy files to Music Media folder when adding to library" both checked. I have a large library with over 87,000 songs, about 1/3rd are from Apple Music and the other 2/3rds are rips from my own collection. It is stored on an external SSD drive.
It appears to me as if the index for all of this has gotten messed up. All of the songs are there but many are in the wrong place, appearing under the wrong albums. When doing Artists view in Apple Music, many songs appear as part of the wrong album. Example - Bruce Springsteen, album The Wild The Innocent and the E Street Shuffle, it shows Thunder Road as track 1, and of course it's track 1 on Born to Run. When I do Get Info/File on that song, it shows that the song is part of the Born to Run album and is filed in the Born to Run folder. So why is Apple Music displaying it this way?
So I unchecked Keep Music Media File organized, checked it again, let it re-index, shut down the Apple Music app, "saving library" took almost 2 hours. Then I started the Apple Music app again, no change, still all wrong.
How do I fix this?
MacBook Pro (M1, 2020)