Why we need to delete from DSO with Additive KF's in case of LIS DS.

Hi,

I have few doubts.

I have LIS Datasource, DSO with Additive Kfs and then a Reporting Cube.

LIS DataSource sends images which DSO processes and sends changelog data to Cube.

I have a request from User to reload data for 1 month. Using setup table.

Steps are: Delete data in both DSO+ CUbe. and run repair full IPs.

Now Question is:
Why I should Delete the data from DSO, LIS always sends correct images also in case of repair full load.
Actully I think DataSource will send all the changes of the document.(we can see in RSA3)

In case of daily dataload we have  images and in case of Repair full there are all images.
Daily load gets adjusted.

then why I need to delete the data in DSO?

DSO should adjust the data in both Active table and intern Reporting Cube.

Please help me here.

Thanks,
Jaydip Patel.