Err/TO getting serial# !

[Éric Allard]

I have 3 DNS, 1 master and 2 slaves. I changed my DNS master
for another machine in the same network with the same configuration
and then I changed the named.conf of my 2 DNS slaves for this new
master (masters {142.169.1.118;};).
I finally killed and restarted all of the named.

After this One of my slave named work wonderfully with my new
DNS master but the the other receives the "notify" but logs
these errors on my namedlog instead of tranfering the zone:

Apr 16 00:34:49 empress named[15410]: [ID 295310 local0.info] rcvd
NOTIFY(169.142.in-addr.arpa, IN, SOA) from [142.169.1.16].34167

Apr 16 00:09:50 empress named[15410]: [ID 295310 local0.info] Err/TO
getting serial# for "quebecpub.qc.ca"
Apr 16 00:19:50 empress named[15410]: [ID 295310 local0.info] Err/TO
getting serial# for "quebecpub.qc.ca"
Apr 16 00:29:50 empress named[15410]: [ID 295310 local0.info] Err/TO
getting serial# for "quebecpub.qc.ca"

P.S.: If I add a completely new zone, this slave DNS accept this zone
but I can't modify this zone with a new serial!

What is this problem? How can I fix it?

Any help will be realy apreciated!