Doing a Delta update twice on same DTP

Hello Experts,

I have loaded my DSO from my PSA using delta update.

Now i have modified the keyfigures of one record in PSA Maintenence and i want to load this record to the DSO overwriting the former record.

SAP does not allow me to create 2 separate DTPs using delta update.

If i execute the same Delta DTP twice, no records are added.

Can someone suggest me the proper way of updating my DSO with the modified record in the PSA?

Thanks in advance,

Nitish.