bbs.0594.com - Database Error

(1052) Column 'dateline' in order clause is ambiguous

SELECT dp.*, p.* FROM forum_post p LEFT JOIN forum_debatepost dp ON p.pid=dp.pid WHERE p.tid=245242 AND p.`invisible`='0' ORDER BY position,dateline LIMIT 20, 10

PHP Debug

No.	File	Line	Code
1	forum.php	70	require(%s)
2	source/module/forum/forum_viewthread.php	584	table_forum_post->fetch_all_debatepost_viewthread_by_tid(%s, %s, %d, %s, false, %d, %d, %s)
3	source/class/table/table_forum_post.php	221	discuz_database::query(%s, Array)
4	source/class/discuz/discuz_database.php	142	db_driver_mysqli->query(%s, false, false)
5	source/class/db/db_driver_mysqli.php	148	db_driver_mysqli->halt(%s, %d, %s)
6	source/class/db/db_driver_mysqli.php	223	break()

Discuz! Database Error