Duplicate data in BW InfoCube

Hi everybody,

I m trying to move data from ECC6 to SAP BW 7.3 InfoCube.

I created a delta data source with the option "Additive delta", I also created an Infopackage to initialize data and an other InfoPackage to fetch new/modified data. Finally I created an InfoCube and a DTP to get data from PSA to the InfoCube.

my problem is when I modified the quantity of an purchacing order item, I found both the old and the new value in the InfoCube !!!

for example: I modified a PO item

PO Item | Quantity

Old Value 4500000002 | 14000.00

New Value 4500000002 | 16000.00

In the InfoCube I found both entries.

Please tell me did I do somthing wrong?

Thank you in advance.