Regarding the OS upgrade to Leap 16.0
After updating everything (inkluding Rockstor with the postgres migration) on leap 15.6, I installed the opensuse-migration-tool and ran it for the OS migration. The rockstor-testing repo was the only old repo I kept, as @Hooverdan pointed out there is not yet a rockstor 16.0 repo.
Nevertheless, after the update the machine rebooted successfully, but rockstor is not installed anymore - as it seems to still have the dependency to Python 3.11 
$ systemctl list-unit-files 'rockstor*'
UNIT FILE STATE PRESET
rockstor-hdparm.service enabled disabled
1 unit files listed.
$ sudo zypper in rockstor
Refreshing service 'openSUSE'.
Loading repository data...
Reading installed packages...
Resolving package dependencies...
Problem: 1: nothing provides 'python311' needed by the to be installed rockstor-5.5.3-0.x86_64
Solution 1: do not install rockstor-5.5.3-0.x86_64
Solution 2: break rockstor-5.5.3-0.x86_64 by ignoring some of its dependencies
Choose from above solutions by number or cancel [1/2/c/d/?] (c): c
According to the announcement of by @phillxnet the new V5.5.3 should already have made the move to Python 3.13 if I read it correctly. V5.5+ Testing Channel Changelog - #7 by phillxnet
How should I proceed, in order to be able to install rockstor on leap 16.0?
Cheers Simon