Insert ACF Post Meta

gistfile1.php

// Simple ACF Field insertion based on explanation here: 
// https://support.advancedcustomfields.com/forums/topic/acf-repeater-filed-in-add_post_meta/
// and the awesome Get Field Key https://gist.github.com/mcguffin/81509c36a4a28d9c682e

function insert_acf_post_meta($key, $value_to_insert, $id) {
  $field_name = $key;
  $field_name__ = "_".$field_name;
  $field_key = acf_get_field_key( $field_name, $id );

  add_post_meta($id, $field_name, $value_to_insert, true);
  add_post_meta($id, $field_name__, $field_key, true);
  
}