IN cockpit webui terminal on fully updated Leap Micro 5.5 (KVM VM with 20GB
disk)

$ translactional-update shell # let's switch to the tu-shell
$ zypper --releasever 6.0 in openSUSE-repos # to get new repo definitions
$ zypper --releasever 6.0 dup

After doing about 80% the cockpit is down and console shows only audit: backlog
limit exceeded

Seems to be relevant to:
https://access.redhat.com/solutions/473223

I am suspicious that it might be just disk space, as base install has 4GB, we
have to fetch packages somewhere and then install them (with snapshot in mind).