Problems with Auto upgrade

When trying to use the auto upgrade to 2.7.1 I get:

Cannot redeclare pclziputilpathreduction() (previously declared in /home/rotaryp/public_html/new/wp-content/plugins/wordpress-automatic-upgrade/lib/pclzip.lib.php:5421) in /home/rotaryp/public_html/new/wp-admin/includes/class-pclzip.php on line 5498

Any help greatly welcome, never had this problem on previous upgrades. They always went smooth as silk!