Discuz! Database Error

(1064) You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Vada')' at line 2
INSERT INTO common_session (sid,ip1, groupid,lastactivity, action, fid, uid, username ) VALUES ('WT6F6u','000' ,'10', '1511284001','1','0','2713','Thel'Vada')

PHP Debug

No.FileLineCode
1forum.php131discuz_database::query(%s)
2source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
3source/class/db/db_driver_mysql.php153db_driver_mysql->halt(%s, %d, %s)
4source/class/db/db_driver_mysql.php224break()
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