Hello,
As you mentioned that you are loading in a DSO. Then i beleive there is no need for worries. You can directly delete 3 days request and load it back with the help of pseudo delta/Selective full load.
As you are having a DSO layer, the data will be overwrite and loading for flow ahead will be without any error. Just make sure that the key figures in your DSO are in overwrite mode and not in additive mode.
Cheers !!