Crossgrade from OpenCloud

Nextcloud version 9, 10, 11, 12, 13:
Operating system and version OpenSuse Leap 42.3:

The issue you are facing:

Moving from OpenCloud 10.0.7.2 to any version.

Is this the first time you’ve seen this error? Y:

Steps to replicate it:

I have tried extracting the tars for 9, 10, 11, 12 and then running the OCC upgrade command. The results are as follows:

9.1:

An unhandled exception has been thrown:

OC\HintException: [0]: Downgrading is not supported and is likely to cause unpredictable issues (from 10.0.7.2 to 9.1.6.1) ()

10:

An unhandled exception has been thrown:

OC\HintException: [0]: Downgrading is not supported and is likely to cause unpredictable issues (from 10.0.7.2 to 9.1.6.1) ()

11:

The process control (PCNTL) extensions are required in case you want to  interrupt long running commands - see http://php.net/manual/en/book.pcntl.php

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

Doctrine\DBAL\DBALException: Unknown database type  requested, OC\DB\OCSqlitePlatform may not support it.

Update failed

Maintenance mode is kept active

Reset log level

12+:

The process control (PCNTL) extensions are required in case you want to interrupt long running commands - see http://php.net/manual/en/book.pcntl.php

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

Doctrine\DBAL\DBALException: Unknown database type  requested, OC\DB\OCSqlitePlatform may not support it.

Update failed

Maintenance mode is kept active

Reset log level

Never mind; I found another thread that led me to delete the sqlite_stat1 table, and the upgrade to 13 worked.

FWIW, this was the thread: