It basically means that you can finish what you started. In the next Rookie Rumble, Harry will be a true Novice and won't be able to join. The Rumbles are all for good fun, I'm sorry to see it's upsetting you so much Randy .
As Harry said, if you want to remove yourself from the competition you can unlink the submissions from the competition by clicking Remove From Competition in the sidebar on each of the submission pages.