Category-slug.php and content-slug.php

Hello, I need two templates, for two differents categories.
I have created “category-slug.php” and i need “content-slug.php” but that don’t work.

In my case, i have “category-adoptions-70-euros.php” who work and “content-adoptions-70-euros.php” who don’t work.

How can i do ? please

This is not really sage related.
However, if the one works and the other one not, try to resave the permalinks, most of times that’s the solution.