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

SELECT data
  FROM p_sessions
  WHERE id = '22CC4r2pa3hmhi62gkh42qdrjfjvt2'
; in /mnt/sdb/meedia/piwigo/include/dblayer/functions_mysqli.inc.php on line 845
Fatal error: Call to a member function fetch_assoc() on boolean in /mnt/sdb/meedia/piwigo/include/dblayer/functions_mysqli.inc.php on line 226
Warning: [mysql error 145] Table './piwigo/p_sessions' is marked as crashed and should be repaired

REPLACE INTO p_sessions
  (id,data,expiration)
  VALUES('22CC4r2pa3hmhi62gkh42qdrjfjvt2','',now())
; in /mnt/sdb/meedia/piwigo/include/dblayer/functions_mysqli.inc.php on line 845