You don't need to confirm the specific reported entry in the Codex, you just need to scan one of that type of object somewhere in the region and it will be confirmed for you. As Riverside said the Codex only shows things from 3.3 onwards.
*chuckles*
As much as I would like it too, I'm sure you remember what Mr. Brookes said when he did it too.
I think he said they'd always be willing to do it, and then he not only promisedit but also guaranteed it.