Hi Ahmad,
You can load duplicate records into WO DSO and while loading data from WO DSO to S DSO, thru routine you can make a correction.
If your not using semantic keys concept then you can Do Not Check Uniqueness of Data un-check this option. it will allow duplicate records. if you feel any duplicate records in WO DSO, then while loading data from WO DSO to Further, you can filter them.
Thanks