I’m glad you got things running but it’s too bad you had to restort to such measures. 
I’ve seen a few other “databse version” errors reported lately so it sounds like there might be a growing pain involved with changing particular Dupicati versions. If the DB version issue comes back for you please see if there are any other tickets about it and chime in or go ahead and start your own. Hopefully with enough reports we can narrow down some commonalities to find a specific cause.
Edit:
For reference, here’s another one: