Comment by Álvaro García on How to update a child entity of an aggregate root when I modify a property in another aggregate root?

I am storing the price in the product the actual price, but I store the price in the offer too, that is the price that the product had in the moment to create the offer, so it can´t be changed never. However, the price in the product is the actual price, and can be change increasing or decreeasing, according to the circunstances. In summary, I guess i need the price in both places, in the offer and in the product.