Remove current post from relationship fields which refer to the same post type (Wordpress + ACF)

functions.php

<?php

// Remove current post from relationship fields which refer to the same post type
function remove_current_post_from_self_relationships($args, $field, $post_id) {
  $args['post__not_in'] = array($post_id);
  return $args;
}

$self_relationship_fields = array('relation_cases_cases');
foreach ($self_relationship_fields as $key => $field_name) {
  add_filter('acf/fields/relationship/query/name=' . $field_name, 'remove_current_post_from_self_relationships', 10, 3);
}