Infocube data correction

Hi experts,

I have a little issue in an infocube, data is like this:

The data is loaded like this from ECC, I need to correct it in BW level by filling all the related contracts when they are empty.

I thought about doing it at end routine level while loading it from the DSO, I am stuck with the abap logic.

The idea is to use the field contract as key and fill the related contract each time it’s empty. At the end the expected result is:

Thanks for your help.

Amine