GUID appears incorrect

I just dumped $post and I noticed that my guid is showing an incorrect value (even though nothing appears to be broken).

My GUID shows: https://url.com/my_cpt/392// while other post types show a non-rewritten url, something like https://url.com/?post_type=other_cpt&p=448.

The actual working address is https://url.com/my_cpt/amsterdam/een-nieuwe-titel-392/

This is how I rewrote the permalinks:

function sd_change_post_type_link( $link, $post = 0 ) {
    $city = get_field('sd_city', $post->ID);
    if ( $post->post_type == 'my_cpt' ){
        return home_url( 'my_cpt/' . strtolower($city) . '/' . $post->post_name . '-' . $post->ID .'/');
        // return $link;
    } else {
        return $link;
    }
}

function sd_add_rewrite_rules() {
    add_rewrite_rule(
        'my_cpt/([^&]+)/([^&]+)-([0-9]+)/?$',
        'index.php?post_type=my_cpt&p=$matches[3]&city=$matches[1]&name=$matches[2]',
        'top' );
}

Like I said it all appears to be working, but just to be safe, I’d like to get the GUID to show the correct value.