Update to latest "master" branch

Hello. I’m trying to update NC 20.0.9 to latest daily build.
i’ve tried differents tarballs from https://download.nextcloud.com/server/daily/
included latest.tar.bz2 and latest-master.tar.bz2
unfortunately both looks like older versions.
OC\HintException: [0]: Downgrading is not supported and is likely to cause unpredictable issues (from 20.0.0.9 to 19.0.4.2) ()
got this with latest.tar.bz2

An unhandled exception has been thrown:
OC\HintException: [0]: Downgrading is not supported and is likely to cause unpredictable issues (from 20.0.0.9 to 20.0.0.7) ()
got this with latest-master.tar.bz2

i will like to include latest merged code to solve some issues

Necrobump, but the thread is perfectly suited: I also just tried to upgrade an existing NC 22.0 to latest-master resulting in the above-mentioned error. I noticed that version.php defines that it may be upgraded-to 23 from 22.1 onward, but even if I change that to 22.0, the same message appears. Do I really have to install a NC instance from scratch if I want to test the compatibility of my app with the latest NC alpha? Anyway, since the upgrade is from 22 to 23, the error message itself is wrong.