SAP Message WH086 - Entry of vendor not allowed

Diagnosis
Vendor &V1& was entered for this item. However, a special stockindicator was not entered.

System Response
The system cannot post this item.

Procedure
If you want to enter a count for the special stock, enter theappropriate special stock indicator.
If the vendor was entered by mistake, you can delete it in the "Vendor"field in the IDoc editor and then post the IDoc again.