lasts posts duplicated on featured posts on home

Hello,
I display on the home page of my site the featured posts and underneath, I display the title and the description of the categories and then the last 3 posts of each category.

The problem I am having is that I sometimes find myself with a duplicate post of the featured posts than some of the last 3 articles of the categories displayed below.

How can I avoid displaying recent posts that are already in featured articles?

Thanks in advance, here is the url to my site to see what I am talking about (go down and see the "food" category, the first post is already in the featured posts.

https://comment-stocker.fr

Thanks in advance
Phil