Create/update post title from ACF fields

//Auto add and update Title field:
  function my_post_title_updater( $post_id ) {

    $my_post = array();
    $my_post['ID'] = $post_id;

    $manufacturer = get_field('manufacturer');
    $target_product = get_field('target_product');

    $manufacturer_target = get_field('manufacturer', $target_product);

    if ( get_post_type() == 'manufacturer' ) {
      $my_post['post_title'] = get_field('manufacturer_name');
    } elseif ( get_post_type() == 'products' ) {
      $my_post['post_title'] = get_field('kitName') . ' (' . get_field('manufacturer_name', $manufacturer->ID) . ' ' . get_field('kitNumber') . ')';
    } elseif ( get_post_type() == 'reviews' ) {
       $my_post['post_title'] = get_field('kitName', $target_product->ID) . ' (' . get_field('manufacturer_name', $manufacturer_target->ID) . ' ' . get_field('kitNumber', $target_product->ID) . ')';
    }

    // Update the post into the database
    wp_update_post( $my_post );

  }

  // run after ACF saves the $_POST['fields'] data
  add_action('acf/save_post', 'my_post_title_updater', 20);