By default, WooCommerce reduce the stock of an order’s associated products when the order’s status is updated. With this plugin you’ll have manual control of reducing item stock straight from the order page in the WordPress admin.
Manually reducing the stock for an order is very useful for store owners who include free samples with orders, create manual orders in the admin, or change items for an order in general. The plugin uses WooCommerce functions to reduce stock which ensure that stock is reduced only for items that haven’t had their stock reduced already.