Can`t remove IP address

[transporter]

Hi!
The problem is that I can`t remove IP address from Nameserver`s IP. When I tested cpanel on my machine the ip was 192.168.0.2. But now the machine is production server with real ip address. When I try to delete 192.168.0.2 i got these error:

Sorry, the nameserver ip 192.168.0.2 cannot be removing since it is still registered with an ICANN register.

Can you help me ?
Thank`s in advance.

[tweakservers]

try login to your server as root via ssh and edit the file /etc/nameserverips to remove the IPs