Discuz! Database Error

(145) Table '.\99nets\forum_thread' is marked as crashed and should be repaired
SELECT a.tid,a.subject,a.fid,b.name FROM forum_thread a inner join forum_forum b on a.fid=b.fid where a.displayorder!=-2 ORDER BY a.tid DESC LIMIT 0,100

PHP Debug

No.FileLineCode
1sitemap.php14discuz_database::query(%s)
2source/class/discuz/discuz_database.php136db_driver_mysql->query(%s, false, false)
3source/class/db/db_driver_mysql.php151db_driver_mysql->halt(%s, %d, %s)
4source/class/db/db_driver_mysql.php218break()
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