setInheritanceData(1234,
                   {'parent_id': 12345,
                    'priority': 0,
                    'maxdepth': 0,
                    'intransitive':False,
                    'noconfig':False,
                    'pkg_filter':''})

Fault: <Fault 1: '<class \'psycopg2.IntegrityError\'>: insert or update on table "tag_inheritance" violates foreign key constraint "tag_inheritance_tag_id_fkey"\nDETAIL:  Key (tag_id)=(1234) is not present in table "tag".\n'>

GenericError: No such entry in table tag: 1234