Warning:  [mysql error 1064] You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 7

DELETE i
  FROM pbwc_download_sets_images AS i
    INNER JOIN pbwc_download_sets AS s
    ON i.set_id = s.id
  WHERE
    status != "done" AND
    date_creation < DATE_SUB(NOW(), INTERVAL  HOUR)
; in /var/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 864

Warning:  [mysql error 1064] You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 5

UPDATE pbwc_download_sets
  SET status = "done"
  WHERE
    status != "done" AND
    date_creation < DATE_SUB(NOW(), INTERVAL  HOUR)
; in /var/www/piwigo/include/dblayer/functions_mysqli.inc.php on line 864