Migrating from ownCloud gives error that downgrades not supported

ℹ️ Support
1

Greetings.

I have an ownCloud instance running 9.1.6.2. I’m trying to upgrade/migrate it to Nextcloud.

I’m trying both the manual and automated methods here:

With the automated method, it tells me:

Current version is 9.1.6.
Migration to Nextcloud 10.0.6 available.
Following file will be downloaded automatically: https://download.nextcloud.com/server/releases/nextcloud-10.0.6.zip

But then below in the extraction process it says:

Downloaded version is lower than installed version

Which… is wrong.

If I try the manual approach, I get essentially the same error message from both the GUI and the CLI tool:

Downgrading is not supported and is likely to cause unpredictable issues (from 9.1.6.2 to 9.1.5.2)

Which again is… wrong. I don’t know what 9.1.5.2 has to do with anything.

Any idea what the issue is here? I’m at a loss for what it’s complaining about.

2

According to line 40 here:


there is an possible upgrade path from ownCloud 9.1 to Nextcloud 11.0.8

So I would do a manual upgrade to Nextcloud 11.0.8 strictly following the documentation for manual upgrades:
https://docs.nextcloud.com/server/11/admin_manual/maintenance/manual_upgrade.html

3

Thanks, but despite that file it’s still blocking an update to version 11:

$ php occ upgrade
Nextcloud or one of the apps require upgrade - only a limited number of commands are available
You may use your browser or the occ upgrade command to do the upgrade
Set log level to debug
Exception: Updates between multiple major versions and downgrades are unsupported.
Update failed
Maintenance mode is kept active
Reset log level
4

Hm. Sorry.

Then do manual update with version 10.0.6 and before running sudo -u www-data php occ upgrade change line 28 in version.php from
OC_Version = array(9, 1, 6, 1);
to
OC_Version = array(9, 1, 6, 3);

I hope that works then. Don‘t forget a backup before the upgrade!

5

Yeah, manual updates weren’t working, either. I also tried upgrading OC in place to the latest version (which worked), then cross-grading from there to Nextcloud from there. That failed the same way.

Searching around the forums it seems this is an extremely common problem, so I eventually gave up and just did a fresh reinstall. Basically the OC migration tool appears to be broken, period. :frowning:

I hope people on larger installs than my 2-user almost-all-files system can find some other workaround. I couldn’t.