MySQL Error: 1052 : Column 'dateline' in order clause is ambiguous

[Bailx]

Any idea whats causing this / how to fix it?

Database error in vBulletin 3.6.0:

Invalid SQL:

					SELECT threadid, firstpostid FROM thread AS thread
					LEFT JOIN deletionlog AS deletionlog ON (thread.threadid = deletionlog.primaryid AND type = 'thread')
					WHERE visible = 1 AND open != 10 AND thread.forumid IN(2) AND deletionlog.primaryid IS NULL
					ORDER BY sticky DESC,dateline DESC
					LIMIT 5;

MySQL Error  : Column 'dateline' in order clause is ambiguous
Error Number : 1052
Date         : Saturday, August 19th 2006 @ 05:57:38 PM
Script       : http://www.mysite.com/cmps_index.php
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Classname    : vb_database