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

SELECT data
  FROM piwigo_sessions
  WHERE id = '03EBo3knkad5m0jv9ucbm30v94irm5'
; in /var/www/html/piwigo/include/dblayer/functions_mysqli.inc.php on line 864
Fatal error: Call to a member function fetch_assoc() on a non-object in /var/www/html/piwigo/include/dblayer/functions_mysqli.inc.php on line 228