There are multiple theories on how planets could have been migrated in/out or they came into existence in our solar system. But the problem is this cannot be re

There are multiple theories on how planets could have been migrated in/out or they came into existence in our solar system. But the problem is this cannot be reverse engineered and verified because early on when solar system was getting formed even small disturbances, interactions or flyby of foreign planets or objects could have altered by course of history without leaving any trace.