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NNC-00431:

NS address does not match any of the current addresses
Cause: When delegating a domain, the address of the Nameserver is provided by the client. If the nameserver already exists, then it already has address(es) associated with it. So, the address supplied by the client must match one of them. Otherwise, this error occurs.
Action: Not normally visible to the user, except when using name server control program. If the error occurs when using the control program, either provide an one of the existing addresses of the name server or delegate the domain to a new nameserver.