Extension Method in EPiServer.Commerce.Order.IOrderGroupExtensions
ApplyDiscounts(this IOrderGroup orderGroup, IPromotionEngine promotionEngine, PromotionEngineSettings settings);
When this method is called on order object it is adding duplicate line item and removing the other line items. This is the case only when If you have created a Discount/Promotion and has Product in the `This discount does not apply to these catalog items` list. Then if you have that product addedf in cart along with other products in that case above specified method add's duplicate line item.Example:- Suppose you have Product A in excluded list and Product A and Product B in cart then on Applying discount you will have two products and both will be Product A.Because of this we are getting an exception of duplicate line item. I guess it should not have added duplicacy and either provide error or apply discount only to Product B as per example case.
What are the details of the promotion being applied?
Hello Sandeep, Have you customized promotion that you are applying? Couple of things to check - 1. You don't have multiple promotions active for the same item and same amount if any threshold is limited. This will conflict and not a valid case.2. Check for promotion processor if you have it customized.
Hi Surjit and Manoj,First of all thanks for your response.I have created a Campaign and in that have two discounts 1. Item Discount (20% off) : 20% off on particular category items, it is applied automatically 2. Order Discount (Spend100) : 10% discount on spend of 100, it is applied with promotion codeI have not customized promotion and there's no limits set.