Add new DNS-Server to multiserver-setup

Hello everyone,

I have a multi-server setup with two DNS servers without DNSSEC. Server 2 is a mirror of Server 1. This setup has been running for several years.
My provider terminated my VPS for Server 2 because it's too old.

I've now set up Server 3 and configured it as a mirror of Server 1.
I copied all the files from /etc/bind/ from Server 1 to Server 3. Copied to PC and then to the new server all with WinSCP.
Server 3 is responding correctly.

When I make a change to the DNS settings in ISPConfig, I get an error on Server 3: /etc/bind/pri.<domainame>.err.
This file only contains the changes. The file /etc/bind/pri.<domainame> itself remains unchanged.

How can I configure Server 3 to correctly apply the changes? Do I need to synchronize anything else?

Thanks for your help.
Thomas

 

Thanks for your reply.
What exactly do I need to adjust?
Are the settings shown in the screenshot correct? ns01 is the Server 1, Server 2 and Server 3 are not listed in the pull-down.

Thomas