How to go back to older project's version?

I had a project that worked fine besides normal bugs from my code, but I unknowingly changed Unity version and went back and forth a few times but obviously just made it worse. The scene is changed and the game not working properly in the 2017.4.3f1 version and it gives two errors in 2019.1.0f2. I was looking for recovering some older version of the project but it turns out the project is in collab and the latest save showing in the collab history is too old. The last resource is just manually copying everything to a new project I guess... Sorry for my english and thanks