Hello,
When adding a parts list product to the cart it is always creating a new line instead of incrementing an existing one - https://www.screencast.com/t/A4NoQ3idSxc
The issue seems to be here - https://www.screencast.com/t/Z9mZn0m9K - shouldn't the validation be the same? While troubleshooting, using the Line.Added notification, I saw that new orderline UnitId is null and empty on the existing one.
DW version - 9.9.2
BR, Mario