It is only neccessary if you're not using an enterprise subscription. If you're using at least the community subscription, you will get a subscription code that unlocks the already enabled enterprise repository and everything works as it should.
I am on PVE 8.2.2 and do not want to update to the latest at this moment. As I noticed suddenly I get problem to install LXC Ubuntu 24.04 I wonder if it is possible to only update the pve-container without breaking the system?
Asking chatgpt and got this: apt update && apt install --only-upgrade pve-container
we do try to encode all requirements/constraints between packages, but it's always possible that we've overlooked something - I would not recommend forcing partial upgrades, the resulting set of code is not really tested.