SAP Message WU004 - The SP curr. in the promotion is not the same as the sales price currency

Diagnosis
The currency of a promotion item differs from the header currency.
Enter the currency in which the promotion sales volume isplanned in the header of the promotion. The sales volume of the itemis converted into the header currency when totaling the plannedsales if the currency of the item differs from the header currency

Procedure
If the item currency should actually differ from the headercurrency, confirm your current entry using "ENTER" .