pmx-location on sophos puremessage 5.6.1 Linux

Hello,

We have four edges servers and one csm server:

Edges servers :

mailgatea : pmx-location : 

Hostname: mailgatea.smals-mvm.beIP Address: 85.91.175.39   --> good

mailgateb: pmx-location :

Hostname: mailgateb.smals-mvm.beIP Address: 85.91.175.40  --> good

mailgatec : pmx-location :

Hostname: mailtrunka.smals-mvm.beIP Address: 85.91.175.44 --> name mismatch

mailgated : pmx-location : 

Hostname: mailgatea.smals-mvm.beIP Address: 85.91.175.39  --> name mismatch

csm servers:

mailtrunka : pmx-location :

Hostname: mailtrunka.smals-mvm.beIP Address: 85.91.175.44  --> good

How can I change the location on mailgatec and mailgated.

If (on mailgatec) I do pmx-location :

pmx-location --prev-hostname mailtrunka.smals-mvm.be            --new-hostname mailgatec.smals-mvm.be --prev-ip 85.91.175.44           --new-ip 85.91.175.41

The location is correctly changed on mailgatec but  it is also incorrectly replicated on mailtrunka server.

mailtrunka : pmx-location :

Hostname: mailgatec.smals-mvm.beIP Address: 85.91.175.41  --> name mismatch

Best regards