Scope claiming no IP addresses. New devices no ip, DNS not updating

[jimmy_2k]

Hi all, is anyone any good with DNS/DHCP. Our DHCP server was showing as out of IP addresses.

 

In the scope there were 60 excluded IP addresses which weren't being used for anything anymore so I edited the exclusions to include those 60 addresses. That looked like it was working and two new devices appeared in DHCP but I was then getting the error Forward record registration for IPV4 addresses and FQDN failed with error 9017 (DNS bad key). After reading some help guides online I changed the option on the scope to Always dynamically update DNS records. After I restarted the scope I'm now getting the message DHCP scope is out of addresses despite adding some earlier and those IP addresses haven't been allocated. Tried deleting one PC's DNS records but when you try to get it to pick up and IP address the PC says unable to contact your DHCP server. Anyone any ideas?