I recently updated an openSUSE Leap Micro 6.1 machine running Uyuni 2025.05 before upgrading to Uyuni 2025.07:

1# transactional-update
2# reboot

After running transactional-update (as suggested by the Uyuni documentation) and rebooting the system, Uyuni couldn't be started anymore:

1# mgradm start
24:36PM INF Welcome …