SAP Message PVJ318 - Unit of measure &3 for material &1 only has generated EAN/UPC &2

Diagnosis
Unit of measure &v3& for material &v1& does not have an EAN/UPC. As anEAN/UPC is needed for price catalog maintenance, EANUPC &v2& wasgenerated.

System Response
The catalog item cannot be transferred.

Procedure
Maintain a valid EAN/UPC in material maintenance.