thanks @leesteken, the idea of shrinking the swap partition and using the additional space for the /boot partition got me on the right track :) I didn't use GParted but did it on the running node.
In case anyone stumbles on this as well, here's...
One of my PVE nodes has been installed some years ago and even though it has always upgraded it to the newest PVE version (currently 8.4.3), one thing has been bothering me for a while.
When the node was installed, it was done by using ext4 &...