Corrupted big library, most albums are suddenly split up

[Chris_Passon]

Roon Core Machine

Apple iMac (Retina 5K, 27’', ultimo 2014), 4 GHz Quad-Core Intel Core i7, 16GB RAM

Networking Gear & Setup Details

n.r.

Connected Audio Devices

n.r.

Number of Tracks in Library

36.000+ tracks, 3400+ albums

Description of Issue

It must have happened some time ago, or it still happens, that a majority of my albums have been split up in the album view into two (sometimes more) entries, which is a total disaster since I prefer to listen to my music by albums.
I have not recognised a pattern why some tracks are in one or the other album. The album title is equally and it is possible to merge the albums, but this is not what I want to spend my time with to get the mess fixed up. And, as said, I wonder whether this is a bug that keeps splitting my albums, because to my perception the problem has got worse over time.

I definitely need a programmatic fix which merges all the albums, at least where the tracks are simply separated into various versions of the same album (with same album artist).

Hope you can help me here.

Here a picture how it looks like

[DDPS]

Could you show a screenshot of the tags for one of those split albums in a tag editor?

[Chris_Passon]

I guess this came from Apple Music when I moved my library from the older iMac to the new Mac Mini. I somehow have to find an easier way to merge the albums back again into one album. At the moment I just do it manually when I want to listen to a specific album.