Problems upgrading from 10.0.4 to 11.0.3

I’m trying to upgrade from 10.0.4 to 11.0.3. But I get the following error when running occ upgrade from the 11.x copy of NC:

Exception: Updates between multiple major versions and downgrades are unsupported. Update failed

Then going back to the 10.x copy, if I run occ upgrade it says Nextcloud is already latest version. If I run occ status I get:

  - installed: true
  - version: 9.1.4.2
  - versionstring: 10.0.4
  - edition: 

I wonder about the 9.x value of version. And what is the difference between version and versionstring?

When running the 10.x code, I also get a notification about a newer version of Owncloud 9.x is available. What is going on? It’s all mess, but 10.x has been running without problems.

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I managed to get everything to work. The solution was to upgrade from 10.0.4 to 11.0.0. Then to 11.0.3 (most recent 11.x).

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Thank you!
I have the same issue and this solution works for me.