RPi4 > Move data to SSD > Supervisor not starting anymore

Hello,
I’ve followed the guide available on github: operating-system/partition.md at dev · home-assistant/operating-system (github.com)
After executing “datactl move /dev/sda” and rebooting the system, I see that the partition has been moved successfully, but Home Assistant is struggling with:
“Waiting for Supervisor to startup…”
Now the web GUI is unreachable, I can only use a shell via HDMI/USB…
Any hint?
Thanks!