Script: remove a product from a shop

Hello,

I want to put business roles in ITShop to "offer" them in self-service. In order to do that, I create an assignment resource and add it to a shop thanks to creating a new ITShopHasRessource object.

Now I want to remove this resource from the shop but when I delete this ITShopHasRessource object, my product is still in the shop. Do you know how can I do that?

Regards,

Serge