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 * FROM forum_thread WHERE authorid=0 and tid=

PHP Debug

No.FileLineCode
1forum.php141require(%s)
2source/module/forum/forum_viewthread.php37discuz_database::fetch_all(%s)
3source/class/discuz/discuz_database.php199discuz_database::query(%s, Array, false, false)
4source/class/discuz/discuz_database.php271db_driver_mysql->query(%s, false, false)
5source/class/db/db_driver_mysql.php305db_driver_mysql->halt(%s, %d, %s)
6source/class/db/db_driver_mysql.php447break()
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