I might be wrong, but it looks like I’ve stumbled upon a duplicate. The album in question is The Köln Concert by Keith Jarrett:
If I’m right I’d love to help sort this out but it looks like at least intermediate level of difficulty and I’m new to this. Would anyone be willing to mentor me through it, or maybe just point out the relevant reading material?
And edit https://musicbrainz.org/release/733b8ed9-a393-46b8-9309-69564e96e7e6 to split the medium in two.
Add an existing (itself) medium and then remove first medium last two tracks and second medium first two tracks.
Renumber tracks as A1, A2, B1, B2 for first LP and C1, C2, D1, D2 for second LP.
It’s difficult to do but necessary prior to merge otherwise identical releases.