Data overwrite in Master data
I'm loading data for master data for InfoObject X (with attributes A,B,C and D) from 3 non-sap sources. I had these questions. The key field here is infoobject X itself:
1) Will the data gets overwritten, if same keyfield come from two source systems?
2) I'm thinking of incorporating 0SOURSYSTEM as one of the attribute as well to avoid such a situation, so should I also make 0SOURSYSTEM as the key field?