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 ') order by rand() limit 3' at line 1
SELECT tid,fid FROM forum_thread where closed=0 AND replies<80 AND fid IN () order by rand() limit 3

PHP Debug

No.FileLineCode
1forum.php71require(%s)
2source/module/forum/forum_viewthread.php995include(%s)
3data/template/27_diy_forum_viewthread.tpl.php1hookscriptoutput()
4source/function/function_core.php1204hookscript()
5source/function/function_core.php1167plugin_bang_ireply_vip->global_footer(Array)
6source/plugin/bang_ireply_vip/ireply.class.php77discuz_database::query(%s)
7source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
8source/class/db/db_driver_mysql.php153db_driver_mysql->halt(%s, %d, %s)
9source/class/db/db_driver_mysql.php224break()
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