Empty Posts 2 Posts tables when using wp site empty

empty-p2p-tables.php

<?php
/**
 * Requires WP-CLI v0.24.0-alpha or later because it needs https://github.com/wp-cli/wp-cli/pull/2647
 */
if ( defined( 'WP_CLI' ) && WP_CLI ) {
	WP_CLI::add_hook( 'after_invoke:site empty', function(){
		global $wpdb;
		foreach( array( 'p2p', 'p2pmeta' ) as $table ) {
			$table = $wpdb->$table;
			$wpdb->query( "TRUNCATE $table" );
		}
	});
}