One would have assumed that the man of your caliber would be able to rescue your precious without a factory reset
I tried but found that there was no pkcon in recovery mode and I had to follow the same steps, except I had to make a backup first.

Let's see:

• 1.0.0.5 Kaajanlampi (starting point after factory reset)
• 1.0.2.5 Maadajävri
• 1.1.2.16 Yliaavanlampi
• 1.1.7.28 Björnträsket (off-topic observation: it looks like "bread basket" )
• 1.1.9.30 Eineheminlampi
• 2.0.0.10 Saimaa
• 2.1.1.24 Jämsänjoki

Wow, you were spot on! Literally "6 or 7", depending on whether you count the starting point.