SAP Message WH063 - Date of price change missing

Diagnosis
The date of the price change is not entered in the header record of thedocument, but a reason for the price change is entered for each
item.

System Response
Sales price revaluation cannot be carried out. The system cannot update
this intermediate document.

Procedure
If you want to carry out a sales price revaluation, please enter theprice change date at header level and the reason for the price changeat item level. Then post the document again.
If you want to carry out a store physical inventory, please enterneither a price change date nor a reason for a price change.