Update not working / Migration needed


  • Used Zammad version: 4.1
  • Used Zammad installation type:package
  • Operating system: CentOS
  • Browser + version: Chrome

Hello, I have tried to update our Zammad. After initial difficulties I managed to upgrade us from version 3.6 to version 4.1. As the Zammad page shows, you should always upgrade from major to major version. I did not find the possibility to jump from 4.1 to 5.0. What I did was finally: “yum update zammad-4.0.0”. This worked until 4.1, with 5.0 it does not work. How do I go about this?

In addition, I have the PostgreSQL database running at version 9.24, how can I update the database to make Zammad 6.0 usable?

Thanks a lot!

Zammad 5.0 requires PostgreSQL 9.3 already.
This means you’ll have to install and migrate a newer postgresql version before updating to that version already.

The more current postgresql version can be solved by adding the postgresql repository as mentioned in the documentation:


After that stop Zammad and make sure to create a snapshot/backup.
Then you can use pg_upgrade to actually upgrade your database cluster to v14.
If that has worked you should be able to remove postgresql 9 and continue from there.


This page might help with slight adaptions to your versions as well: