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

SELECT data
  FROM piwigo_sessions
  WHERE id = '0A0Aotp2l7fc3i7n0einn3p9lgo6j4'
; in /var/www/html/piwigo/include/dblayer/functions_mysqli.inc.php on line 856