bbs.blackshark.com - Database Error

(1176) Key 'digest' doesn't exist in table 'forum_thread'

SELECT * FROM forum_thread FORCE INDEX (digest) WHERE `fid`='52' AND `displayorder` IN('0','1','2','3','4') AND `digest`>'0' AND (`hide`<>'1' OR `hide`='1' AND `authorid`='0') ORDER BY displayorder DESC, lastpost DESC LIMIT 20

PHP Debug

No.	File	Line	Code
1	forum.php	81	require(%s)
2	source/module/forum/forum_forumdisplay.php	657	table_forum_thread->fetch_all_search(Array, %d, %d, %d, %s, %s, %s)
3	source/class/table/table_forum_thread.php	609	discuz_database::fetch_all(%s)
4	source/class/discuz/discuz_database.php	101	discuz_database::query(%s, Array, false, false)
5	source/class/discuz/discuz_database.php	137	db_driver_mysqli->query(%s, false, false)
6	source/class/db/db_driver_mysqli.php	147	db_driver_mysqli->halt(%s, %d, %s)
7	source/class/db/db_driver_mysqli.php	222	break()

Discuz! Database Error