function wc_update_260_zones() {
	global $wpdb;
	/**
	 * Old (table rate) shipping zones to new core shipping zones migration.
	 * zone_enabled and zone_type are no longer used, but it's safe to leave them be.
	 */
	if ( $wpdb->get_var( "SHOW COLUMNS FROM `{$wpdb->prefix}woocommerce_shipping_zones` LIKE 'zone_enabled';" ) ) {
		$wpdb->query( "ALTER TABLE {$wpdb->prefix}woocommerce_shipping_zones CHANGE `zone_type` `zone_type` VARCHAR(40) NOT NULL DEFAULT '';" );
		$wpdb->query( "ALTER TABLE {$wpdb->prefix}woocommerce_shipping_zones CHANGE `zone_enabled` `zone_enabled` INT(1) NOT NULL DEFAULT 1;" );
	}
}