If you moved the entire install across did you try to just start the container before attempting an upgrade?
If you have a backup why not restore it to a fresh installation?
You’re attempting to rebuild from 1.6, which should work, but is far more headache.
Why skip prereqs? As you’re rebuilding that doesn’t skip the update, only the checks which save you from harder to troubleshoot error messages.
Can you update docker while you’re at it?