SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: SELECT t.*, p.*, i.*, n.id AS newscat_id, n.title AS newscat_title, n.grafikfile, n.position, b.title AS b_title, b.hotthread_reply AS b_hotthread_reply, b.hotthread_view AS b_hotthread_view, b.postsperpage AS b_postsperpage, b.lastposttime AS b_lastposttime FROM bb1_threads t LEFT JOIN bb1_posts p ON (t.threadid=p.threadid && t.starttime=p.posttime) LEFT JOIN bb1_icons i USING (iconid) LEFT JOIN bb1_boards b ON (b.boardid=t.boardid) LEFT JOIN bb1_portal_newscat n ON (t.newscatid=n.id) WHERE t.visible = 1 AND p.visible = 1 AND t.boardid IN (0,3,4,5,6,7,8,9,11,12,13,14,16,17,18,20,21,22,23,25,27,28,29,32,33,34,35,36,38,40,41,42,43) AND t.boardid IN (0) ORDER BY t.starttime DESC LIMIT 0,20
mysql error: Column 'iconid' in from clause is ambiguous
mysql error number: 1052
mysql version: 5.0.77
php version: 5.2.17
Date: 05.02.2012 @ 23:43
Script: /wbb2/portal_newscat.php
Referer: