Warning:  [mysql error 1146] Table 'www_sixtiz.piwigo_config' doesn't exist

INSERT INTO
  piwigo_config (param, value)
  VALUES('data_dir_checked', '1')
  ON DUPLICATE KEY UPDATE value = '1'
; in /var/www/sdb/b/a/www.sixtiz/pwg/include/dblayer/functions_mysqli.inc.php on line 845

Warning:  [mysql error 1146] Table 'www_sixtiz.piwigo_sites' doesn't exist
SELECT galleries_url FROM piwigo_sites; in /var/www/sdb/b/a/www.sixtiz/pwg/include/dblayer/functions_mysqli.inc.php on line 845