Add an order manually from the Wordpress dashboard and let the plugin take care of updating your stock.
A simple woocommerce plugin that will automatically manage stock levels when orders are edited by the administrator
Required Plugins
[Woocommerce] is required to use this plugin, downloadable here (https://en-ca.wordpress.org/plugins/woocommerce/)
Implementation
When editing an order’s status on the backend (including adding a new order, cancelling an order) – a popup will prompt you to update your stock levels accordingly.