Warning:  [mysql error 126] Index for table './piwigo/sessions.MYI' is corrupt; try to repair it

REPLACE INTO sessions
  (id,data,expiration)
  VALUES('AC1Arlggh4mvf4ql4irnlnlh1a32i9','pwg_device|s:7:\"desktop\";pwg_mobile_theme|b:0;',now())
; in /home/sites/sciencegallery/htdocs/include/dblayer/functions_mysqli.inc.php on line 847