SAP Message WU433 - Old currency could not be converted to new currency

Diagnosis
You changed the promotion currency. Conversion of the the sales volumevalues from the old currency into the current currency cannot becarried out.

System Response
The currency change is not accepted.

Procedure
Enter a currency that can be converted. The conversion probablyfailed because no conversion factor was found for both thecurrencies. You can maintain this conversion factor in the system ifrequired.