Discuz! Database Error

SELECT dp.*, p.*,pp.floor,pp.isselfs FROM posts p LEFT JOIN forum_debatepost dp ON p.pid=dp.pid LEFT JOIN posts_position dp ON p.pid=pp.pid WHERE p.tid=709 AND p.`invisible`='0' ORDER BY p.dateline LIMIT 10/*bbs2016#/thread-709-1-1.html*/