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 ' ',')) > 0 LIMIT 1' at line 1
SELECT * FROM forum_forumfield WHERE INSTR(CONCAT(',', relatedgroup, ','), CONCAT(',', , ',')) > 0 LIMIT 1

PHP Debug

No.FileLineCode
1forum.php63runhooks()
2source/function/function_core.php1132hookscript(%s, %s, %s, Array, %s)
3source/function/function_core.php1181call_user_func(Array, Array)
4plugin_dicky_threadtype->common(Array)
5source/plugin/dicky_threadtype/pc.class.php44discuz_database::fetch_first(%s)
6source/class/discuz/discuz_database.php94discuz_database::query(%s, Array, false, false)
7source/class/discuz/discuz_database.php142db_driver_mysql->query(%s, false, false)
8source/class/db/db_driver_mysql.php152db_driver_mysql->halt(%s, %d, %s)
9source/class/db/db_driver_mysql.php223break()
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