Thread:Extension talk:DynamicPageList (Wikimedia)/Fatal error: Cannot redeclare wfDynamicPageList()

Hey, after upgrading from 1.5 to 1.6 (Mediawiki version: 1.21.2 Fatal error: Cannot redeclare wfDynamicPageList (previously declared in /home/MyWeb/www/www/w/extensions/intersection/DynamicPageList.php:70) in /home/MyWeb/www/www/w/extensions/DynamicPageList/DynamicPageList.php on line 81 PHP: 5.3.26 (cgi-fcgi)

Any idea what's happen?

Regards