Data Base Error in when trying to print coupons

I keep getting this message when I print or order coupons. I have been using the site for a few years and this has never happened:

A Database Error Occurred

Error Number: 145
Table './sc_couponscanada/coupon_access' is marked as crashed and should be repaired
SELECT COUNT(*) AS `numrows` FROM (`coupon_access`) WHERE `coupon_id` = '1757' AND `ip` = '216.232.148.247' AND `timestamp` > 1399089600
Filename: /home/sites/sc/couponscanada.smartcanucks.ca/models/coupon.php
Line Number: 1296