Cant upgrade OM Rome Plasma 6 (due to third party repo)

@RAD Welcome,

You don’t tell us how you are trying to update the system.
See How to update system
Read also this topic

Also useful to specify which ISO you installed, downloaded from where (ROME 24.07? - from SourceForge?)

Try upgrade again with:

sudo dnf clean all ; dnf clean all ; dnf repolist
sudo dnf --refresh --allowerasing distro-sync 2>&1 | tee dsync-log.txt

and attach here the full dsync-log.txt file.