Why am I getting a fatal error doing the SmushPro update?

I received notification in my dashboard that SmushPro needed updated. But when I clicked the link to update it automatically, it said that it was unable to update due to a fatal error. It automatically deactivated the plugin and won't let me reactivate it now. Please help? Here is the message I get:

Fatal error: Cannot redeclare wp_smush_rating_message() (previously declared in /home/twocraz6/public_html/wp-content/plugins/wp-smushit/wp-smush.php:73) in /home/twocraz6/public_html/wp-content/plugins/wp-smush-pro/wp-smush.php on line 88