How to change virtual server dns and remove "suggested" settings??

Hi I’ve got a weird one here in that I can’t edit the DNS of one of my Virtual Servers. It was the first I added but under Server Configuration in Virtualmin there is just “Suggested DNS Settings” to view but you can’t edit them…

When I click that it says:

This virtual server’s DNS domain is not hosted by your Virtualmin system. If the domain is hosted elsewhere, the records below should be used to ensure that the website and email functions correctly.

BUT the problem is the nameservers in there are wrong, when I check BIND settings for the Master Zone in Webmin everything looks correct. How do I change these suggested settings or even better just have it so I can go to DNS settings rather than having this Suggested option? Thanks for any help!