A lower OSS note dependent on higher OSS note

Hi All,

Our team is trying to implement  a OSS note, say #12345 via txn SNOTE and noticed that it pops up asking to implement #22222. It triggers some thoughts among ourselves.

Is anyone able to advice why or under what sort of circumstances would a lower OSS note be dependent on a higher OSS note?

Shouldn't a OSS note only need OSS notes that are lower than it is to satisfy its pre-requisite?

Thanks.

Regards,

Annie