As the name tells it is about meta data, not the real data!? (keep in mind I have no idea how well Nokia fscked this message/contacts storing up in Harmattan, so I may be plain wrong)

I guess you would need with that meta.db the according data databases (mentioned them above, but do not know if they are complete) on the phone. Worth a try if I where you.

Else I would go with the original meta.db, delete all contacts (maybe delete all messages?) and try to restore again from backup.