In the classic DSO you can create a semantic key in addition to the technical key. You can also select the setting unique records. This will prevent records with duplicate (semantic) key records from being loaded into the classic DSO.
In the advanced DSO the button "Key Management" is grayed out as soon as I change the DSO settings to write optimised. The same is true for the settng unique records.
How can I replicate the semantic key functionality in an advanced DSO?