We have created 4 different packing slips dated 03/08/2021, 03/09/2021 and 04/09/2021. Every packing slip is having 2 items with 1 qty each. When we are trying to create invoice proposal for the packing slips dated 03/08/2021, 03/09/2021 and 04/09/2021, system is showing the quantity of all the packing slips which are posted earlier also.

Invoice proposal should be created on the basis of packing slip posting.