Advice: How to Fix a Staircase After Downloading a Lot from the Gallery

I enjoy downloading interesting builds from the Gallery, and I love sharing my own creations as well. I always test everything I upload, but sometimes, even though my lots aren't free from bugs and they still have issues. I’ve noticed that one of my best-performing creations might be non-functional for some of the players. Additionally, I’ve seen that many simmers what have similar problem with other creations seek advice on what to do in this situation or even blame the creator for the error.

Personally, I try to avoid clutter and decorations on the staircase to minimize risk. However, sometimes, after downloading my own build, previously functional house stops working properly. If you encounter this bug, the solution is simple: just remove the existing staircase and place a new one. This should fix the issue every time.

I refer to this build I made some time ago:

https://www.ea.com/en-gb/games/the-sims/the-sims-4/pc/gallery/C893452FD9AC41E9A75B368D56B2BBC3?category=all&searchtype=ea_origin_id&sortby=downloads&time=all&searchquery=Sthenastia&max=50&maxis=false&setLocale=en-gb