Grettings,
I broke my own rule and jump on the recent update and it hit me in the face:
I have a cluster with 3 Proxmox servers (pmx1 & pmx3; pmx2 used just for quorum)
The sequence used to upgrade was:
I upgrade pmx2 (the one just for quorum, it doesn't run any vm) and reboot
Migrate all vms...