Well that was one of the best upgrades ever! Thanks to all who worked hard at achieving this.
I had one error that I thought I would document for others.
Last year I replaced my boot drive, a Kingston SV300. The 6.x upgrade threw one error out:
Code
Setting up grub-pc (2.04-20) ...
/dev/disk/by-id/ata-KINGSTON_SV300S37A120G_50026B774A00D337 does not exist, so cannot grub-install to it!
You must correct your GRUB install devices before proceeding:
DEBIAN_FRONTEND=dialog dpkg --configure grub-pc
dpkg --configure -a
dpkg: error processing package grub-pc (--configure):
installed grub-pc package post-installation script subprocess returned error exit status 1
Setting up python3-six (1.16.0-2) ...
I ran:
A popup window asked which drives to install Grub on, I chose the current boot volume (a Kingston SV400) and it completed fine.
I rebooted (this was the first time trying) and it booted successfully into OMV.