I'm trying to finalize an order created programmatically without payment, but I get the following exception when trying to save the order:

System.InvalidOperationException: 'Cannot edit order as it is, or has been processed for payment.'

I can that on the order IsFinalized = false, IsFinalizing = true, FinalizedDate = {3/5/2021 1:29:56 PM} and _originalState.FinalizedDate = null

Here is the code:

var shippingCountryId = order.ShippingInfo.CountryId.HasValue
                        ? order.ShippingInfo.CountryId.Value
                        : order.PaymentInfo.CountryId.Value;

                    var shippingMethod = VendrApi.Instance.GetShippingMethodsAllowedIn(shippingCountryId).FirstOrDefault();
                    order.SetShippingMethod(shippingMethod);

                    var paymentMethods = VendrApi.Instance.GetPaymentMethodsAllowedIn(order.PaymentInfo.CountryId.Value);
                    var zeroValuePaymentMethod = paymentMethods.FirstOrDefault(x => x.Alias == VendrCheckoutConstants.PaymentMethods.Aliases.ZeroValue);
                    order.SetPaymentMethod(zeroValuePaymentMethod);

                    order.InitializeTransaction();
                    order.Finalize(order.TotalPrice, Guid.NewGuid().ToString("N"), PaymentStatus.Authorized);
                    _orderService.SaveOrder(order);