There is a domain example.com. It is using four Name Servers from the Name Servers Set:
Top > Service Director > Domain Manager > Domains > example.com > Name Servers
ns01.nameserver.com ns02.nameserver.com ns03.nameserver.com ns04.nameserver.com
That is also reflected on the DNS Zone tab:
Top > Service Director > Domain Manager > Domains > example.com > DNS Zone
NS ns01.nameserver.com. NS ns02.nameserver.com. NS ns03.nameserver.com. NS ns04.nameserver.com.
Name Servers was changed to Use custom Name Servers:
Top > Service Director > Domain Manager > Domains > example.com > Name Servers > Edit > Use custom Name Servers
ns1.another.nameserver.com 192.168.1.2 ns2.another.nameserver.com 192.168.1.3
Name Servers tab only two new name servers are shown. But the
DNS Zone tab lists the following nameservers:
NS ns04.nameserver.com. NS ns1.another.nameserver.com. NS ns2.another.nameserver.com.
The last name server from the Name Servers Set
ns04.nameserver.com remained intact.
Such behavior was classified as the software issue PBAS-29979 and was fixed in OBAS 4.5.5.
To resolve the issue, please upgrade to 4.5.5 as described in How to upgrade OBAS system to the latest available version.
As a workaround, please remove the last name server (
ns04.nameserver.com in our example) from the domain DNS zone manually.