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 'a'a',posts=posts+1,todayposts=todayposts+1 WHERE fid='2'' at line 1
UPDATE forum_forum SET lastpost='201760 【太阳城0110】新用户注册 1730418292 a'a'a',posts=posts+1,todayposts=todayposts+1 WHERE fid='2'

PHP Debug

No.FileLineCode
1forum.php71require(%s)
2source/module/forum/forum_misc.php1732showmessage(%s, %s, Array, Array)
3source/function/function_core.php1416dshowmessage(%s, %s, Array, Array, %d)
4source/function/function_message.php239include(%s)
5data/template/2_2_common_showmessage.tpl.php1hookscriptoutput(%s)
6source/function/function_core.php1204hookscript(%s, %s)
7source/function/function_core.php1167plugin_pao_reply_robot->global_footer(Array)
8source/plugin/pao_reply_robot/pao_reply_robot.class.php42discuz_database::query(%s, %s)
9source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, true)
10source/class/db/db_driver_mysql.php153db_driver_mysql->halt(%s, %d, %s)
11source/class/db/db_driver_mysql.php224break()
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