I'm getting the following error after paypal payment
PayPal gateway has rejected request. A successful transaction has already been completed for this token (#10415: Transaction refused because of an invalid argument. See additional error messages for details).
The error occurs only if the cart contains virtual product (services and downloadable). If I add a "physical" product all works fine. When I get the error, Paypal complete the payment but Magento did not create the order.