"Album data inconsistent with other tracks"

[aabeba]

This only happens with certain albums, even though the album artist is the same (copy-pasted) for every track on the album. Any idea what's going on here?

[Steven]

i can see it would also show that message when the disc numbers are inconsistent

[aabeba]

Cheers, man; that fixed it!

Related question: any way to deal with tag inconsistency when there are two separate albums with the same name by a single artist, but in different years? Apropos of Johnny Cash's 1964 and 1970 albums, both titled I Walk the Line (the latter is a soundtrack).