Hello !
I recently installed Centreon 22.10 using the OVA image given.
I then updated it to 23.04 using the documentation. (Upgrade from Centreon 22.10 | Centreon Documentation)
Then, using the web API import/export, populated it with centreon 2.6 hosts, services etc..
In the broker configuration I changed the conf file from “central-module.xml” to “poller-module.json” and the central was up.
I then changed the conf files of central-broker-master to “central-broker.json” and central-rrd-master to “central-rrd.json”. Following these changes the central went down as such.

I followed → My poller is down | Community (centreon.com)
But did not find an answer.
I have found errors in /var/log/centreon-broker/central-module-master.log :
[2023-05-30T16:28:58.259+02:00] [core] [info] multiplexing: engine started
[2023-05-30T16:28:58.261+02:00] [core] [info] Poller '' with id 0 connected
[2023-05-30T16:29:11.051+02:00] [core] [info] bbdo stream stopped with 0 events acknowledged
[2023-05-30T16:29:11.051+02:00] [core] [info] Poller '' with id 0 just disconnected
[2023-05-30T16:29:11.051+02:00] [tcp] [error] Error while reading on socket: Operation aborted.
[2023-05-30T16:29:11.051+02:00] [core] [info] multiplexing: stopping engine
[2023-05-30T16:29:11.051+02:00] [core] [info] multiplexing: sending events to muxers for the last time 0 events to send
The same error was found in /var/log/centreon-broker/central-broker-master.log
Also, in /var/log/centreon-gorgone/gorgoned.log I get :
2023-05-30 16:29:17 - ERROR - [proxy] Cannot create child, need a core id
2023-05-30 16:29:17 - ERROR - [proxy] Cannot create child, need a core id
2023-05-30 16:29:17 - ERROR - [proxy] Cannot create child, need a core id
2023-05-30 16:29:17 - ERROR - [proxy] Cannot create child, need a core id
2023-05-30 16:29:17 - ERROR - [proxy] Cannot create child, need a core id
If someone has any idea I would be happy to give more details.