Discuz! Database Error

(1176) Key 'digest' doesn't exist in table 'forum_thread'
SELECT * FROM forum_thread FORCE INDEX (digest) WHERE `fid`='117' AND `displayorder` IN('0','1','2','3','4') AND `digest`>'0' ORDER BY displayorder DESC, lastpost DESC LIMIT 20

PHP Debug

No.FileLineCode
1forum.php67require(%s)
2source/module/forum/forum_forumdisplay.php644table_forum_thread->fetch_all_search()
3source/class/table/table_forum_thread.php527discuz_database::fetch_all()
4source/class/discuz/discuz_database.php106discuz_database::query()
5source/class/discuz/discuz_database.php142db_driver_mysqli->query()
6source/class/db/db_driver_mysqli.php148db_driver_mysqli->halt()
7source/class/db/db_driver_mysqli.php223break()
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