ddns 'RRset exists (value dependent)' prerequisite not satisfied (NXRRSET)

[Gregory Machin]

Hi

I'm running  DHCP Server V3.0.1 on Debian 3.2 and BIND 9.7.1-P2 on
Ubuntu 10.10 , this is part of a staged migration , hens the old
Debian server.

When machines request an ip from the dhcp server I see the following
in the dhcp server logs :

Can't update forward map nzhmlwks0091.et.endace.com to 192.168.69.245:
no such RRset

And at the same time on the Bind server I see :

Feb 28 16:17:11 nzhmlsrv01 named[3363]: client 192.168.64.242#40426:
view interenal: updating zone 'et.endace.com/IN': update unsuccessful:
nzhmlwks0091.et.endace.com: 'name not in use' prerequisite not
satisfied (YXDOMAIN)
Feb 28 16:17:11 nzhmlsrv01 named[3363]: client 192.168.64.242#40426:
view interenal: updating zone 'et.endace.com/IN': update unsuccessful:
nzhmlwks0091.et.endace.com/TXT: 'RRset exists (value dependent)'
prerequisite not satisfied (NXRRSET)

What are these errors and how do I resolve them ?

Thanks

Greg