In many places, we have to manage fake authorized value categories branches,itemtypes and cn_source. Like : https://git.koha-community.org/Koha-community/Koha/src/commit/af093305b8c936f20c49fa707d5bc58fc9059ba8/admin/authorised_values.pl#L107 We should have a central place, or a column in table 'authorised_value_categories'.