Discuz! Database Error

(1267) Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (utf8mb3_general_ci,COERCIBLE) for operation '='
SELECT * FROM common_member WHERE username='֮YY'

PHP Debug

No.FileLineCode
1home.php41require_once(%s)
2source/module/home/home_space.php30table_common_member->fetch_by_username()
3source/class/table/table_common_member.php65discuz_database::fetch_first()
4source/class/discuz/discuz_database.php94discuz_database::query()
5source/class/discuz/discuz_database.php142db_driver_mysqli->query()
6source/class/db/db_driver_mysqli.php148db_driver_mysqli->halt()
7source/class/db/db_driver_mysqli.php223break()
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