SAP Message 06673 - Supplying plant &1 can be used for plant &2 for stock transfer only

Diagnosis
The combination of item category standard and supplying plantV1 is not allowed, since the supplying plant belongs to the samecompany code as plant &V2&.

Procedure
If you wish to procure a material from supplying plant &V1&, you mustuse the item category stock transfer.
If you wish to use the item category standard, you must choose asupplying plant that belongs to a different company code than plantV2.