pfSense

Restoring a configuration with DHCP lease data can lead to a PHP error when restoring during a fresh install:

[12-May-2022 18:31:16 ] PHP Warning: file_put_contents(/var/dhcpd/var/db/dhcpd.leases): failed to open stream: No such file or directory in /etc/inc/config.lib.inc on line 264

If the restore part happens before the first DHCP daemon startup that directory structure likely doesn't exist yet.

See also: https://forum.netgate.com/topic/172133/php-errors-with-2-7-0-development-amd64-20220512-1201-snapshot