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 '' at line 1
SELECT it618_class1_id FROM it618_scoremall_class2 WHERE id=

PHP Debug

No.FileLineCode
1plugin.php47include(%s)
2source/plugin/it618_scoremall/scoremall_list.inc.php154discuz_database::result_first(%s)
3source/class/discuz/discuz_database.php117discuz_database::query(%s, Array, false, false)
4source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
5source/class/db/db_driver_mysql.php154db_driver_mysql->halt(%s, %d, %s)
6source/class/db/db_driver_mysql.php225break()
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