I recently made the mistake of thinking that I duplicated a Spark Page project. However, it did not duplicate and I ended up saving over my original project. When I realized my mistake, I didn't update the link so the existing one is still available, but I have no way to save the original project now (part of a weekly publication). Saving as we go is great BUT it would be nice if we could revert back to an original published page as long as we haven't updated the link.