It could, by saying that the category for a product in the store is immutable and that if you want to change it, you must create a new item. If that doesn't wor

It could, by saying that the category for a product in the store is immutable and that if you want to change it, you must create a new item. If that doesn't work, extend it to the item's title and removing any of the pictures of the product (you can add more, but it's append only). Should work fine to prevent this.