Zammad update, 500 Internal Server error with apt-upgrade

[sebschremser]

I had the same problem. You can choose the version in the source.list file.
Maybe my thread can give you some hints:

Zammad 4.1 update

Infos: Used Zammad version: 4.1 Used Zammad installation type: deb package Operating system: Ubuntu 18.04 Browser + version: many Expected behavior: update the system according to your documentation. No major version should be skipped Actual behavior: repository only has zammad 6.x version available Steps to reproduce the behavior: have an old zammad 4.1 server and try to update zammad I have a Zammad 4.1 server (Ubuntu 18.04) and I want to upgrade it to the latest version (including Ub…