Migration from R4.2 to R4.3 didn't go as planned

[1n40]

Hi everyone,
long time no see. It took some time, but today I did figure out what to do about this error, and it was solution that most likely wasn’t expected.
For hte Grub2, I was able to manually install fc41 versions by searching for RPMs.
ALL OF THE COMMANDS ARE BEING EXECUTED AS ROOT

dnf remove breeze-icon-theme

with this, I was able to actually execute stage 3

qubes-dist-upgrade --releasever=4.3 -y -s

More than 1600 packages were upgraded/downloaded
But, after the upgrade, sys-net, sys-firewall and sys-whonix didn’t start. To fix this, I used commands from

4.3 upgrade Error: Check of pool qubes_dom0/vm-pool failed

I had a 4.3 upgrade Stage 3 failure where an old kernel-qubes-vm package couldn’t be removed. I fixed that issue and manually removed the package. I then manually ran the remaining commands (systemctl preset-all and systemctl enable) from the Stage 3 part of the upgrade script. I rebooted into Qubes 4.3 to complete Stages 4-6. After rebooting, none of my qubes are able to start. If I manually start a qube, I see this error: Error: Check of pool qubes_dom0/vm-pool failed (status:64). Manual rep…

These were the commands I executed:

journalctl --vacuum-time=1d
lvresize --size 40G /dev/qubes_dom0/root
resize2fs /dev/mapper/qubes_dom0-root
lvconvert --repair qubes_dom0/vm-pool

With this done, all previously mentioned qubes did start again.
Then, I executed another part of migration

qubes-dist-upgrade --releasever=4.3 -y --all-post-reboot

For stage 4, every single migration attempt is failing. This bug is reported

Root access fails on debian-12-minimal templates created in r4.2 and restored in r4.3, causing qubes-dist-upgrade error

And with that, I was able to boot into R4.3 with 6.18 kernel