Warning message now on all my pages

Warning: Missing argument 2 for wpdb::prepare(), called in /home/content/92/7549292/html/wp-content/plugins/nextgen-gallery/lib/tags.php on line 318 and defined in /home/content/92/7549292/html/wp-includes/wp-db.php on line 990

HOW DO I FIX THIS? pLEASE HELP! I DON’T KNOW WHAT I DID WRONG!

http://www.fryfamilyfarm.com

http://wordpress.org/extend/plugins/nextgen-gallery/