Hole in screed (8mm wide, approx. 8mm deep) in upper screed layer

Hi,

I am about to lay carpet on approximately 17-year-old (young) screed.
The floor is very level and I have meticulously removed all slight protrusions (splattered filler and the like).
Now I wanted to start with the carpet (not fully glued) and at the last moment I found a single, lonely small hole in the screed.
It has about 8mm diameter and is about 8mm deep (the screed itself is 6cm thick).
It was superficially rust-brown. After cleaning by scraping, only the edges are slightly brown.

Does it necessarily have to be closed, or can I simply lay the carpet over it?

Thank you very much for any help!

Carpet on and all good. Don’t worry.

In principle, I agree with mycraft, yet I would close the hole (mortar, plaster, or some wood that is available). With that diameter, it might still be noticeable. Or a woman with high heels could, depending on what is laid there, pierce through it, and then you have a hole in whatever is lying there.

Something random, chewing gum or [Analgam] would also be an option-:). And afterwards, continue living as calmly as possible..........

I would close it with plaster. That's the fastest way.

Wouldn't it be better to first form a working group to get to the bottom of the cause of the hole?