To recreate: 1 - Set title (or any other patron field) as both mandatory and unwanted across the sysprefs BorrowerMandatoryField, BorrowerUnwantedField, PatronSelfModificationBorrowerUnwantedField, and PatronSelfRegistrationBorrowerMandatoryField 2 - On the staff client, edit an existing patron and confirm that title is hidden and not mandatory. Make a new patron and confirm same. 3 - Log into the OPAC as an existing patron, go to your personal details, confirm title is mandatory and not hidden. 4 - self-register a new patron on the opac, confirm title is mandatory and not hidden My biggest goal here is consistency -- whichever preference they give priority to, it should be the same on both staff and OPAC. I slightly prefer giving priority to the mandatory sysprefs.