削除エラー: (pymysql.err.IntegrityError) (1048, "Column 'subsidy_info_id' cannot be null") [SQL: UPDATE subsidy_info_history SET subsidy_info_id=%(subsidy_info_id)s WHERE subsidy_info_history.id = %(subsidy_info_history_id)s] [parameters: {'subsidy_info_id': None, 'subsidy_info_history_id': 13}] (Background on this error at: https://sqlalche.me/e/20/gkpj)