Legacy processing updated required(Qubits|Results) but left the originals unchanged. This sets the order to look for the legacy values (which are the most correct until processing is updated) followed by the correct attr, and then the bugged attr values.
Legacy processing updated required(Qubits|Results) but left the originals unchanged. This sets the order to look for the legacy values (which are the most correct until processing is updated) followed by the correct attr, and then the bugged attr values.