BIND 9 messages

[Tony van der Hoff <lists@vanderhoff.org>]

Hi, I'm running Lenny with Bind 9 on my server; all working fine, except 
that whenever I connect a new client, I get the syslog message:

tony-lx named[4179]: client 192.168.1.12#56479: updating zone 
'magpieway.net/IN': update unsuccessful: TONY-XP.magpieway.net/CNAME: 
'rrset does not exist' prerequisite not satisfied (YXRRSET)

I've unsuccessfully man'd and googled, as well as read the bind 9 
documentation, so I guess I've missed something. Can anyone please tell 
me what this means, and how to fix it?

Cheers, Tony