SAP Message WV728 - Market-basket price calculation nr &1 already used; choose another number

Diagnosis
The system has discovered that the number &V1& has already beenallocated to another market-basket price calculation.

System Response
V1 cannot be accepted for the current market-basket pricecalculation.

Procedure
Select another number for the market-basket price calculation or, ifthe selected pricing type permits internal number assignment, have thesystem assign a number.