Wrong composer in Douce Dame Jolie

[moteconhuesillo]

Hi! Searching for a score the medieval song "Douce Dame Jolie" by De Machaut in IMSLP I came across this https://imslp.org/wiki/Douce_dame_jolie ... ,_Anthony) page. It appears as composed by Anthony St. Pierre, and only lyrics by De Machaut. That is incorrect though, as the melody is the same of the De Machaut song. It has a piano accompaniment, but that should be labeled as arrangement, and not original composition.
Am I right? I don't actually know how to fix that, so if somebody could do it it would be very nice.
Thank you :)