The DNS server machine currently has no DNS domain name
Solution 1:
Windows DNS will auto configure certain records based on whether your server has a FQDN or not. Example the NS and SOA and A record for the DNS server. Looks like you just installed the machine and the DNS role. You haven't given it a name other than the auto assigned WIN-EG75FS9C2F2 random name. Once you give it a FQDN like server.domain.com, DNS will be able to add records into any zones you create in DNS.
Solution 2:
If this is a new install of a DNS Server, run through the DNS Server Wizard:
- Select Start > Administrative Tools > DNS.
- Highlight your computer name and from the top choose Action > Configure a DNS Server to launch the Configure DNS Server Wizard.
Tech Republic has a good run down of walking you through the wizard step by step.