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

SELECT data
  FROM piwigo_sessions
  WHERE id = 'D8494pq35ftfti6qdvgu9iiol5ju20'
; in /var/www/vhosts/weatherdata.gr/httpdocs/piwigo/include/dblayer/functions_mysqli.inc.php on line 845

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

REPLACE INTO piwigo_sessions
  (id,data,expiration)
  VALUES('D8494pq35ftfti6qdvgu9iiol5ju20','pwg_lang_switch|s:5:\"sl_SI\";pwg_device|s:7:\"desktop\";pwg_mobile_theme|b:0;pwg_whois_list_ids|s:0:\"\";pwg_whois_url_type|s:0:\"\";',now())
; in /var/www/vhosts/weatherdata.gr/httpdocs/piwigo/include/dblayer/functions_mysqli.inc.php on line 845