DSO mapping creates a new record instead of overwriting the record

   Hi All,

i have a DSO with 8 key fields...i have enhanced the DSO for adding a extra field ZABTRG.......my datasource has 3 key fields and one ZPAID field in which 3 key fields are mapped to the respective key fields in DSO out of those 8 key fields........now when i transfer the data to the target DSO it creates a new record instead of overwriting the record.....i assume it happens since it has only 3 key fields and the DSO has 8 key fields.....is there any workaround to get extra field data in the same record