Mixed up Khaled

In my library,
an unknown australian Khaled

is credited in all the albums of the algerian singer Khaled.
In allmusic the credits are OK.
this is the classical situation when roon takes the file tags and do not match them with its metadata, but “doubles” the credits with spurious data.
I cannot correct this locally: i would have to delete any single occurrence, track by track, of the wrong khaled, and change it in the correct khaled with the same role (composer, various instruments).

@support, the problem has not been solved