Hi,
I just noticed that one of my PMG has a some old kernel :
apt list --installed | grep pve-kernel
WARNING: apt does not have a stable CLI interface. Use with caution in scripts.
pve-kernel-5.3.18-1-pve/stable,now 5.3.18-1 amd64 [installé, automatique]
pve-kernel-5.3.18-3-pve/stable,now...