Warning:  [mysql error 144] Table './photodb/piwigo_sessions' is marked as crashed and last (automatic?) repair failed

SELECT data
  FROM piwigo_sessions
  WHERE id = '22CC3b87aoqrdo1c9usakr9keffft4'
; in /mnt/www/photo.aronov.su/include/dblayer/functions_mysqli.inc.php on line 830

Warning:  [mysql error 144] Table './photodb/piwigo_sessions' is marked as crashed and last (automatic?) repair failed

REPLACE INTO piwigo_sessions
  (id,data,expiration)
  VALUES('22CC3b87aoqrdo1c9usakr9keffft4','pwg_device|s:7:\"desktop\";pwg_mobile_theme|b:0;',now())
; in /mnt/www/photo.aronov.su/include/dblayer/functions_mysqli.inc.php on line 830