dovecot - Dec 2016 - Versioning Problem

Hello List,

I have installed dovecot 2.2.25 on three Systems
with two  I have a problem with doveadm / dsync ?

first:
# 2.2.25 (7be1766): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.14 (099a97c)
# OS: Linux 3.10.0-514.2.2.el7.x86_64 x86_64 CentOS Linux release 7.3.1611 
(Core)  

second:
# 2.2.25 (7be1766): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.4.14 (099a97c)
# OS: Linux 3.10.0-514.2.2.el7.x86_64 x86_64 CentOS Linux release 7.3.1611 
(Core)  

But I have this Error in the Logs ?

Dec 27 12:00:12 mx dovecot: doveadm(2a02:xxxx:xxxx:xxxx::218): Error: 
doveadm client not compatible with this server (mixed old and new binaries?)
Dec 27 12:01:08 mx dovecot: doveadm(2a02:xxxx:xxxx:xxxx::218): Error: 
doveadm client not compatible with this server (mixed old and new binaries?)

can any tell me why ?

-- 
mit freundlichen Gr?ssen / best regards

  G?nther J. Niederwimmer