I have Carbionio CE 24.3.0 Ubuntu 22.x and  PostgresSQL 16.x.

I updated to version 24.9.1 following this article:  https://docs.zextras.com/carbonio-ce/html/upgrade/toc.html

this is step by step:

apt clean

apt update

apt upgrade

Configuration file '/etc/janus/janus.eventhandler.rabbitmqevh.jcfg'

 ==> File on system created by you or by a script.

 ==> File also in package provided by package maintainer.

   What would you like to do about it ?  Your options are:

    Y or I  : install the package maintainer's version

    N or O  : keep your currently-installed version

      D     : show the differences between the versions

      Z     : start a shell to examine the situation

 The default action is to keep your current version.

*** janus.eventhandler.rabbitmqevh.jcfg (Y/I/N/O/D/Z) ?     DIGITO Y

Configuration file '/etc/carbonio/carbonio-prometheus/prometheus.yml'

 ==> Modified (by you or by a script) since installation.

 ==> Package distributor has shipped an updated version.

   What would you like to do about it ?  Your options are:

    Y or I  : install the package maintainer's version

    N or O  : keep your currently-installed version

      D     : show the differences between the versions

      Z     : start a shell to examine the situation

 The default action is to keep your current version.

*** prometheus.yml (Y/I/N/O/D/Z) ?         DIGITO Y

Configuration file '/etc/carbonio/message-dispatcher/mongooseim.toml'

 ==> Modified (by you or by a script) since installation.

 ==> Package distributor has shipped an updated version.

   What would you like to do about it ?  Your options are:

    Y or I  : install the package maintainer's version

    N or O  : keep your currently-installed version

      D     : show the differences between the versions

      Z     : start a shell to examine the situation

 The default action is to keep your current version.

*** mongooseim.toml (Y/I/N/O/D/Z) ?     DIGITO Y

dpkg -l carbonio-message-broker

PGPASSWORD=$DB_ADM_PWD carbonio-message-dispatcher-migration carbonio_adm 127.78.0.10 20000

su - zextras -c "zmcontrol status"

# su - zextras -c "zmcontrol status"
Host mail.miodominio.it
amavis Running
antispam Running
antivirus Running
directory-server Running
mailbox Running
memcached Running
mta Running
opendkim Running
proxy Running
service webapp Running
service-discover Running
stats Running
config service Running

su - zextras -c "zmcontrol -v"
Carbonio Release 24.9.1

I hope I have done my part.

thanks