Move ACF Field Groups back to High (after title) position

functions.php

<?php
add_action( 'admin_init', 'prefix_reset_metabox_positions' );
function prefix_reset_metabox_positions(){
  // for posts
  delete_user_meta( wp_get_current_user()->ID, 'meta-box-order_post' );
  
  // for pages
  delete_user_meta( wp_get_current_user()->ID, 'meta-box-order_page' );
  
  // for custom post type Sermon Series
  // replace "sermon-series" with your custom post type
  delete_user_meta( wp_get_current_user()->ID, 'meta-box-order_sermon-series' );
}