Warning: [mysql error 145] Table './eq89185/piwigo3images' is marked as crashed and should be repaired

SELECT DISTINCT(WEEK(date_available, 5)+1) as period,
  COUNT(DISTINCT id) as nb_images FROM piwigo3images
INNER JOIN piwigo3image_category ON id = image_id
    WHERE 1 = 1 AND date_available BETWEEN '2015-01-01' AND '2015-12-31 23:59:59'
  GROUP BY period; in /home/eq89185/html/photos2/include/dblayer/functions_mysqli.inc.php on line 798