Hi @ndh611
Thanks you for the clarification. ACF saves the field group settings in wp_posts table in the DB. So should you wish to do a DB query to update the template, this should work:
UPDATE wp_posts SET post_content = REPLACE( post_content , 'page-a.php', 'page-awesome.php' ) WHERE post_type = 'acf-field-group'
Give this a try and let me know if your issue gets resolved 🙂