Hello Tamás Rózsa
We have checked internally, and the update is, the server upgrade failed because the PostgreSQL (PG) container didn’t start properly. When we tried to roll back, that process got stuck because it wasn’t checking if the containers were actually healthy. One container was stuck, and another took longer than expected to start.
Now your servers are in healthy stare now you can try for major version upgrade now.
If still issue persist you can reach out to us.
I hope this has been helpful! Kindly consider upvoting the Answer if the information provided is helpful. This can assist other community members in resolving similar issues. Happy to help you.