Yes I understand. You need to remove the old puzzle, since that's what we worked on. Now this generated a new task, which means we need to put a new puzzle. But why are we referring to `@todo #552` when we're addressing #591? Should be `@todo #591` instead, which means "This was created while we worked on #591".

See our guide on [Puzzle Driven Development (PDD)](http://www.xdsd.org/2009/03/04/pdd.html).