I have created a custom attribute for quote item,order item problematically. I have added a drop down option with multiple values for all products.(I don't use custom option because my values are dynamic). I am able to save the selected value of drop down in that custom quote item attribute. But the issue is, if I select the same product with different custom values (the dropdown value I have added), it's updating the quantity of existing quote item.
I want to create new entry of quote item instead of updating existing quote item entry. On which event quote item updated? can anyone help me on which event should I add my logic.