Hello All i have a Message on my console when Client received a DHCP adresse;

Cannot Add FQDN; ****.proteknetwork.***.com with adress 192.168.1.*

When i go to the DHCP/DNS Console, i want the DHCP update DNS record, but
it can't?

Its a rigth problem?

My In-add-Arpa, look have the same problems... when i creat a record on my
DNS i dos'nt update the In-Arpa-add..

Thank for your help !