Migrate Threads to different item

gistfile1.php

<?php

add_action('admin_init', function() {
	if ( 27 !== get_current_user_id()) {
		return;	
	}
	
	$threads = get_posts([
		'numberposts' => -1,
		'post_type' => 'phw_comment_loc',
		'meta_key' => 'parent_id',
		'meta_value' => 20903
	]);
	
	foreach($threads as $thread) {
		update_post_meta($thread->ID, 'parent_id', 20901);
		update_post_meta($thread->ID, 'item_id', 20901);
	}
});