Prefab update problem

I have a prefab House1, i’m adding new materials to home, unity updates prefab and i can see that prefab have new materials, but House1 in the scene is not changing in any way. I tried adding some object and they didn’t appear at the where they should be. When i add that prefab to the scene, it comes with last updates. I’m sure that there only one House1 prefab. What am i doing wrong?

Is House1 in the Hierarchy blue?

No, it’s black, does it means it’s not linked to the prefab?

Now i get it, it’s not linked because i deleted object inside unity. Thanks!

no problem