"not mine" messages

[Per olof Ljungmark]

Hi all,

At a clients network, logs at dhcpd server is filled with the following 
type of messages:

dhcpd: Forward map from MAWI-AMILOPRO.sth.uasl.se to 10.17.39.252 
FAILED: Has an A record but no DHCID, not mine.

What could I be doing wrong here, Google is not very responsive to this 
message?

isc-dhcp3-server-3.0.5_2 on FreeBSD-6
BIND 9.3.4 with dynamic updates

Thanks!

Per olof