Recover from filesystem backup: can't rebuild nor start

[Falco]

Oh cool!

So

The source cluster was not shut down cleanly.

You will need to follow this

@fitzy

If you need to postpone the update during your next rebuild, you can swap the PostgreSQL template on your app.yml file by changing "templates/postgres.template.yml" to "templates/postgres.12.template.yml" .

to start the database without the upgrade first, and then do the update afterwards.