Yes, it does say that the prefix is rp_
I guess that this was a bug in version 1.0 because you had another user quite some time ago with the exact same problem rp_ for all db tables EXCEPT usergroups.
I'll run everything again. I have a good back up that is easy to apply.
What do you think about rp_users not being created during this upgrade? That table doesn't exist either in version 1.0.2 and this upgrade doesn't create it.