Why is the item duplicated after entering the quantities?Is it due to different Unit of Measure? Initially CAR was used for GR/Putaway. The count was probably entered as PC instead of CAR units.
I had the same error and found the problem in the customizing of mapping between ERP and EWM storage location: SPRO activity: Map storage locations from erp system to ewmThe problem was a wrong entered logical system as you can see on the screenshot,...