BuddyPress.org

This buggy message is annoying (a synchronizing delay between WP update service and your site), but not important.
At the place where this message appears, you have option button who says “hide this option ?”.
You can use it, or if the button does not appear, wait a few hours or can add this at the end of the file wp-includes/version.php
$wp_local_package = ‘pl_PL’; (will be lost at the next WP update)