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

SELECT data
  FROM piwigo_sessions
  WHERE id = '3437pe7ljul5tcvteljv5p78cu04c7'
; in /var/www/html/photos/include/dblayer/functions_mysqli.inc.php on line 830
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Warning: [mysql error 145] Table './piwigo/piwigo_sessions' is marked as crashed and should be repaired

REPLACE INTO piwigo_sessions
  (id,data,expiration)
  VALUES('3437pe7ljul5tcvteljv5p78cu04c7','pwg_device|s:7:\"desktop\";pwg_mobile_theme|b:0;',now())
; in /var/www/html/photos/include/dblayer/functions_mysqli.inc.php on line 830