Can WordPress Pagination be fixed for one category?

somebody tried to fix pagination problem on my site by adding a function to your functions.php file[![screenshot – console][1]][1]

unfortunately, after updating wordpress or acf, this function does not work and when you try to go to the next page in the "atom" category, it displays 404 – Sorry, this page does not exist.

The pagination problem concerns only one category (subcategory). In the functions.php file I found a function like this:

function fix_atom_category_paged_query( $q ) {
    if ( ! is_admin() && is_category( 'atom' ) && $_GET['debug'] == 1 ) {
        $q->set( 'post_type', 'post' );
        $q->set( 'posts_per_page', 9 );
        // wp_die( var_dump( $q ) );
        return $q;
    }
}

add_action( 'pre_get_posts', 'fix_atom_category_paged_query', 2, 1 ); ```


  [1]: https://i.stack.imgur.com/rKqzT.png