The Nextbox app does not start any more. I have not used my Nextbox for many months. Trying to connect to the Nextcloud failed. Attempting to get the system running again I did prune unused Docker images (that may have been a mistake).
When I check the logs:
$ sudo docker logs nextbox-compose_app_1 | tail -n 3
Initializing nextcloud 29.0.11.1 ...
Can't start Nextcloud because upgrading from 24.0.6.1 to 29.0.11.1 is not supported.
It is only possible to upgrade one major version at a time. For example, if you want to upgrade from version 14 to 16, you will have to upgrade from version 14 to 15, then from 15 to 16.
How can I use a Nextbox image which uses a compatible Nextcloud version?