We should never return '0' here, because there is no biblio with biblionumber of 0 and a FK broken constraint error explodes when trying to migrate from FreeForm to BLDSS, return undef instead, which is expected default value for illrequests.biblio_id
We should never return '0' here, because there is no biblio with biblionumber of 0 and a FK broken constraint error explodes when trying to migrate from FreeForm to BLDSS, return undef instead, which is expected default value for illrequests.biblio_id