Might be a dumb question, but wouldn't the answer marked as "correct" give you a result different from the expected result?
I say that it might be a dumb question because I am not that familiar (ie not at ALL) with R.
The above is all just my opinion on what you should do.
As with all advice you find on a random internet forum - you shouldn't blindly follow it. Always test on a test server to see if there is negative side effects before making changes to live!