The disambiguation field I’m talking about is on the recording, not the track. If you edit a recording you will see the “Disambiguation” field just below the artist and title:
On the track, consensus is to follow the release - if it says “alternate take” or “take 2” include that in the track title (following the ETI format, meaning in parentheses after the actual title).
Answer to myself: I probably don’t need to search for something called ‘disambiguation for tracks’.
(does that even exist?)
From the page in my screenshot, while for ‘Artist’ you need to hit the ‘Edit’ button, for Title it looks like you can just start typing something else there.
I can edit for you (or you try again if you prefer) if you tell me that version names over there at Discogs are correct.
BTW this is a compilation and I moved it to a compilation release group already.
And a 2:33:42 long CD is impossible. I can split to 2 CD at the same time as adding version names.
I (think I) have succeeded in changing the titles now.
About the disk numbers: I searched both the edit pages and the guidelines how to enter disk numbers, but I failed.
So maybe you can do that, or maybe explain to me how I can do it?