Cannot redeclare wp_smush_rating_message

Hello,

after install the plugin, my website show me this error:
Fatal error: Cannot redeclare wp_smush_rating_message() (previously declared in /var/www/vhosts/kreta-keramik.com/httpdocs/wp-content/plugins/wp-smush-pro/wp-smush.php:71) in /var/www/vhosts/kreta-keramik.com/httpdocs/wp-content/plugins/wp-smushit/wp-smush.php on line 93

Any ideas?