https://musicbrainz.org/relationship/4d0d6491-3c41-42c6-883f-d6c7e825b052

Revisions are usually made only by the creator of the original work. Do not use this relationship to link to arrangements, completions, reconstructions or any other work by a third person.

The underlined words contradict each other.

To correct the contradiction, this should either say,

A. (Strike out the 2nd sentence.)

Revisions are usually made only by the creator of the original work.

B. (Correct the contradiction.)

Revisions are only made only by the creator of the original work. Do not use this relationship to link to arrangements, completions, reconstructions or any other work by a third person.