Edit file File name : failed_auto_upgrade.php Content :a:1:{s:8:"26_25480";a:5:{s:5:"insid";s:8:"26_25480";s:8:"from_ver";s:5:"6.8.3";s:6:"to_ver";s:3:"6.9";s:10:"error_code";i:1;s:5:"error";s:189:"This installation does not meet the Auto Upgrade requirements. Hence it cannot be auto upgraded. Following are the details : It is not possible to upgrade WordPress Multisite installations.";}}Save