diff --git a/includes/api/v2/class-wc-rest-orders-v2-controller.php b/includes/api/v2/class-wc-rest-orders-v2-controller.php
index 626b9386a31..a8e022d7111 100644
--- a/includes/api/v2/class-wc-rest-orders-v2-controller.php
+++ b/includes/api/v2/class-wc-rest-orders-v2-controller.php
@@ -1397,11 +1397,6 @@ class WC_REST_Orders_V2_Controller extends WC_REST_Legacy_Orders_Controller {
 								'type'        => 'mixed',
 								'context'     => array( 'view', 'edit' ),
 							),
-							'instance_id'    => array(
-								'description' => __( 'Shipping instance ID.', 'woocommerce' ),
-								'type'        => 'string',
-								'context'     => array( 'view', 'edit' ),
-							),
 							'total'        => array(
 								'description' => __( 'Line total (after discounts).', 'woocommerce' ),
 								'type'        => 'string',