Upgrade seems to be possible with 9.0.6 too. I dont know if this is the case because I had unmaintained switched on. There seems to be a 7.0.4 (sic!) in the unmaintained repository.
4.1 with latest errata applied
I guess you are referring to the steps mentioned in Wiki: OwnCloud App Migration. Where is the link to this guide to be expected?
So doing the upgrade to 9.1 with the UMC is not recommend?
It should appear just after the tests for the app update, right before the installation would start. Instead, a message will be shown, that links to the wiki page you mentioned. In your case, it should be okay to follow the steps in the guide to upgrade
The UMC will initially offer an app update. At one point, the UMC will display a link to the migration guide. That guide has to be followed, and the commands have to be executed in a terminal session.
Unluckily I’ve some problems, to I’ve created a new thread
Why is the password of owncloudadmin after the upgrade “owncloud”? At least there should be a hint in the guide.
Ich habe den Guide gerade um einen entsprechenden Hinweis erweitert. Danke für das Feedback!