Remove previous selected value when cloning

I’ve created a Metabox as follow:

add_filter( 'rwmb_meta_boxes', 'elclarin_register_meta_boxes' );

function elclarin_register_meta_boxes( $meta_boxes )
{
    $prefix = 'rw_';

    $posts   = get_posts(
        array(
            'post_type'      => 'post',
            'posts_per_page' => 500,
            'post_status'    => 'publish'
        )
    );

    $options = array();
    foreach ($posts as $post) {
        if ($post->post_title !== "") {
            $options[$post->ID] = $post->post_title;
        }
    }

    // 1st meta box
    $meta_boxes[] = array(
        'id'       => 'related_link',
        'title'    => __( 'Selección de noticias relacionadas' ),
        'pages'    => array('post'),
        'context'  => 'normal',
        'priority' => 'high',
        'fields'   => array(
            array(
                'name'    => 'Noticia relacionada',
                'id'      => $prefix.'related_link',
                'type'    => 'select_advanced',
                'options' => $options,
                'clone'   => true,
                'placeholder' => 'Seleccione una noticia'
            ),
        )
    );

    return $meta_boxes;
}

This works just fine but it’s possible to remove the selected option before clone the component? What I mean is on pics (linked): first component (holds all the posts), second one (cloned): holds all the posts again and that what I’m trying to prevent since the selected before can’t be there.

Any advice? How I can achieve that if it’s possible?

https://ww.wp.xz.cn/plugins/meta-box/