I tried to merge these identical releases and was warned that some recording artists differed (see screenshot), but they don't.
In the case of Axel F that's certainly a bug as Ed Starink doesn't even appear on the release.
As for "Bangles" vs. "The Bangles", only the artist credits differ, not the recording artists. If this warning is intentional, there's terminological inaccuracy. Personally, I think there shouldn't be a warning at all.