SAP Message WV310 - All calculations for material &1 have been deleted

Diagnosis
All pricing items for material &V1& have been deleted.

System Response
The number of screens has been reduced by one. The calculations for thenext screen are displayed. If the pricing items for the last materialhave been deleted, the calculations for the previous material aredisplayed.
All log entries for material &V1& have also been deleted.