Let me explain the scenario 1st.
I am doing a intra company stock transfer between Plant A to B .all process ok PO->delivery->GR done
But doing the reverse stock transfer from Plant B to A while creating a PO stock trasfer order i am getting the below error
Item category not allowed with document type ZUB
Message no. ME020
The combination of document type ZUB and item category entered cannot
be used because it has not been defined in Customizing for Purchasing.
You have created a purchase order of the document type "standard PO"
with reference to a contract. The contract item you are referencing has
the item category M (material unknown) or W (material group). This item
category was adopted in the PO.
If the combination of document type "standard PO" and item category M or
W has not been defined in Customizing for Purchasing, you must use a
valid combination of item category and document type.
Check your input and change the item category if necessary.
If you wish to create a stock transport order (with item category U),
you must invoke the function Purchase order -> Create -> Stock transfer
or use the order type stock transport order.
Please suggest me how to solve this issue