RPM feeds don't have conflicts between nightly/latest/next
For the Debian package feeds, we have a mechanism in place that marks nightly conflicting with latest and next, and vice-versa. This is implemented in the osmo_obs_prepare_conflict shell function of common-obs.sh
This mechanism is missing from the RPM builds (it apparently was forgotten when adding RPM packages), which makes it easy to run incompatible versions of programs/libraries.
We need to replicate this for RPM based distributions like CentOS.