Ok, this is a weird one.
I started this with version 19.0.4 of Nextcloud up & running. When I try to update to V20.0.0 it tells me
Exception: Updates between multiple major versions and downgrades are unsupported. Update failed
I was able to upgrade to 19.0.9, but going to 20.0.0 I still get the same error. I have tried a few different versions, so I’m curious if this a hidden bug for something else failing or if the roadmap for upgrading is more confusing than I realize!
Thanks for the help!