- logger.warning('{} label "{}" for {} ID "{}" already seen at {} ID "{}". Skipping.'.format(obj_name, obj_lbl, obj_name, obj_id, obj_name, result[obj_lbl]))
+ raise VocabularyError('{} label "{}" for {} ID "{}" already seen at {} ID "{}".'.format(obj_name, obj_lbl, obj_name, obj_id, obj_name, result[obj_lbl]))