We have EWM enabled inbound delivery. Inbound delivery has raw material in HU and returnable packing material. Goods receipt and putaway for returnable packing material is processed through PPF action. PPF action is triggered when TU is checked in (This TU is linked to inbound delivery).
Soon after PPF is processed a negative and positive stock (same quantity) of returnable material is created on TU. Due to this we are not able to check out TU at the end as it says there is stock on TU.
Please suggest what is the root cause and why stock is getting created on TU during GR and putaway.
Thanks for the help.