update-initramfs -u

Hi,
My proxmox node is running for sametime.
Today after same changes i try to execute "update-initramfs -u"
but getting this error.

root@proxmoxlandet:~# update-initramfs -u
update-initramfs: Generating /boot/initrd.img-6.8.12-1-pve
Running hook script 'zz-proxmox-boot'..
Re-executing '/etc/kernel/postinst.d/zz-proxmox-boot' in new private mount namespace..
No /etc/kernel/proxmox-boot-uuids found, skipping ESP sync.

Any ideas how to fix this?
Thanks