错误: An exception occurred while executing 'INSERT INTO M2M_ContestSign (`csid`, `uid`, `tid`, `signtime`, `score`, `pscore`, `time`, `ptime`, `lockstat`) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?)' with params [null, 671294, 109126, 1683930349, null, "", 0, "", ""]: SQLSTATE[22032]: <
>: 3140 Invalid JSON text: "The document is empty." at position 0 in value for column 'M2M_ContestSign.pscore'.