Good plan
Iād suggest meanwhile to read general instructions (often are the same we repeat again and again ) in the topic above mentioned about ROME major upgrades.
The current ROME Plasma6 ISOs are very stable. The next ones for the release only have a handful of upgraded packages like new kernel 6.10.0. Edit: IMO there is no reason to wait.
Developer says the possible reasons for the problem Error unpacking rpm package kernel-desktop-6.9.9-1.x86_64 are bad download or not enough disk space. Disk space might be worth looking in to. Run the command df and locate your / partition and that will tell you how much available disk space you have.
@constantius24 if you still have the broken system and you have checked that you do in fact have enough disk space there is another option. Open Konsole and download the .rpm for the latest ROME x86_64 kernel (now itās 6.10.0):
There is no problem that would result in āError unpacking rpm packageā. The only explanations are bad download and/or disk full. Given it seems to be only the kernel-* packages, Iād guess /boot partition full
So if you installed your system with a separate /boot partiton and if that is to full that would explain this error. Obviously I do not know your system but this one makes more sense to me than anything I have heard on this issue. But you would have to have a separate /boot partition.
Wanting to upgrade a ~1 yr old rolling system (with all the changes in-between) hardly can lead to anything good.
Despite good willing people around to help.