Records not updating DTP treating new records as duplicate

Hi Everyone,

I am encountering problems with 0applic_attr(in other data source also) i tried the Delta and Full in the DTP but i keep on encountering the Duplicate error message as you can see in the image the error records are the same inside the master data table. it fails to update the old record rather it gives me a duplicate error message. any one encountered this kind of problem. Kindly advise

Many Thanks,

Jose Mich