In app purchase allow User re purchase same product


#1

how to allow user to re purchase same product id he purchased before
i tray to test purchase same product but i get message already owned
any suggestion please
this my buy code :

 this.iap
      .buy(product.productId)
      .then((data) => {
      /*
some back end here
*/
      })
      .catch((err) => {
     alert (err);
      });