in server.properties, the following predicates are set up as "user metadata fields":

• dcterms:rights
• dcterms:rightsHolder
• dcterms:license

this is bad(TM), because it allows users to override the values of those predicates which are set with the licensing controls.

removing the offending predicates from server.properties will make the defaults OK, but an admin could still create a problem by re-adding them, so the solution is to "blacklist" these predicates so that even if they're in server.properties, that'll generate an error message in the log and then they will not be available as user metadata fields.