SAP Message V1251 - The item cannot be marked as statistical

Diagnosis
You have rejected an item. The indicator "statistic" appears as thereason for rejection. This indicator cannot be copied into the salesdocument, as subsequent documents already exist for the sales document.

System Response
The statistics indicator is not set for the item.

Procedure
In order that your statistics and/or the condition update are updatedproperly, you have to adapt the item quantity.