Discuz! info: MySQL Query Error

Time: 2018-3-25 1:57am
Script: /space.php

SQL: SELECT m.*, mf.*, s.lastactivity as online
FROM members m
LEFT JOIN memberfields mf ON mf.uid=m.uid
LEFT JOIN sessions s ON s.uid=m.uid AND s.invisible='0'
WHERE m.username='愛_o_別_走' LIMIT 1
Error: Illegal mix of collations (utf8_general_ci,IMPLICIT) and (gbk_chinese_ci,COERCIBLE) for operation '='
Errno.: 1267

Similar error report has beed dispatched to administrator before.