Issue: SQL Error when changing namespace title

Database error in vBulletin 4.0.6:

Invalid SQL:

				DELETE parsed
				FROM dhv_vault_link AS link
				INNER JOIN dhv_postparsed AS parsed ON (parsed.postid = link.postid AND link.type = 1)
				WHERE namespace IN (13)
					AND templateusage = 1
				LIMIT 500;

MySQL Error   : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'LIMIT 500' at line 6
Error Number  : 1064
Request Date  : Sunday, August 29th 2010 @ 11:13:06 PM
Error Date    : Sunday, August 29th 2010 @ 11:13:07 PM
Script        : http://www.XXXXXX.com/admincp/vaultwiki_namespace.php?do=rebuild&namespaceid=13&postcache=,13
Referrer      : http://www.XXXXX.com/admincp/vaultwiki_namespace.php?do=save
IP Address    : XXXXXXXXXXXX
Username      : Trekkan
Classname     : vB_Database
MySQL Version : 5.1.48