I actually came here to ask about this as the example I just ran into was two entries for Juan Esquivel and “Esquivel and His Orchestra”
To me, merging the second into the first is a no-brainer. There’s multiple duplications (“Strings Aflame” and “Other Worlds, Other Sounds” are in both), no rhyme or reason even strictly taking cover-as-intent (“Infinity in Sound” is credited to the orchestra, “Las Tandas” to him individually), and as far as I can tell, no relationships in the Orchestra entry that would be screwed up.