404 Page not found after using same URL in post / page

[jpgos]

Starting from a clean Wordpress 4.8 installation.

1. Configure permalinks to: ​http://domain.com/post-title/
2. Create a post with title 'new'
3. Remove the post with title 'new' to trash
4. Create a new page with title 'new'
5. Remove post 'new' from trash (not necessarily, both cases result in 404)
6. The page you created trows a 404 due to a database error since it has two different objects with the same URL, though different objects.

[SirLouen]

Currently its not throwing exactly a 404, but both post and page have the same ID, priorizing the first posted. This seems to be a duplicate of #13459, so I'm going to be closing this.