Error message - DHCP Server: Resources of this pool ran out

The firewall logs will show you the following error message: DHCP Server: Resources of this pool ran out. Deleting the DHCP scope and re-creating it will solve the issue for a few hours - days. 

Clients won't be able to acquire new IP addresses from the DHCP scopes even though IPs are available.

Should you experience this issue, you can contact our Technical Support team about the DTS number 160769

HF 160769-3o available for Gen5 appliances running firmware versions 5.9.1.1-39o, 5.9.1.5-16o. 

It is needed to disable the "Enable DHCP Server Network Pre-Discovery" from the diag.html page.

Target version 5.9.1.6