umbrelOS 1.0 update for Linux limbo - can only create a new account

I’m stuck in the Linux update process.

I followed the guidelines, and when it didn’t work I tried this No "migrating" after upgrade to UmbrelOS on miniPC - #3 by nmfretz and realised my backup drive is not working(there are files missing).

So now I got the umbrelOS 1.0 installed on my device but the only option is to create a new account.

I still have the old external drive where I kept my 0.54 system installed.

Would appreciate any advise on how to proceed.