I would add that there is no such thing as Papal “succession.” If we could not produce an absolutely reliable lineage of Popes (and, in fact, we cannot), it would not matter.
Popes don’t appoint their successors, so there is no such thing as Papal succession. There IS such a thing as Apostolic Succession of Bishops, but not Papal succession.
The Papacy is similar in this regard to the US Presidency. Nobody needs to know who Abraham Lincoln was (or whom he succeeded, or who succeeded him) to elect a new President. The United States can elect a President irregardless of its knowledge of historic Presidents.