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Database error in vBulletin 3.7.3:

Invalid SQL:

		SELECT t1.templateid AS templateid_1, t1.title ,
t1.templateid AS templateid_1, t1.title AS title1, t1.styleid AS styleid_1 
		FROM template AS t1 
LEFT JOIN template AS t1 ON (t1.title=t1.title AND t1.styleid=29-1)
		WHERE t1.styleid = -1
		ORDER BY t1.title;

MySQL Error   : Not unique table/alias: 't1'
Error Number  : 1066
Request Date  : Tuesday, October 21st 2008 @ 01:19:35 PM
Error Date    : Tuesday, October 21st 2008 @ 01:19:35 PM
Script        : http://www.ro7lewa.com/vb/web2cp/template.php?do=modify
Referrer      : http://www.ro7lewa.com/vb/web2cp/index.php?do=nav
IP Address    : 213.6.176.230
Username      : روح البداوه
Classname     : vB_Database
MySQL Version : 5.0.51a-community