diff --git a/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/CHANGELOG.md b/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/CHANGELOG.md
index 10f3ee60ca7d..2261aa87ee56 100644
--- a/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/CHANGELOG.md
+++ b/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/CHANGELOG.md
@@ -1,8 +1,9 @@
-# Change History
+# Unreleased
 
 ## Additive Changes
 
-### New Funcs
+### Struct Changes
 
-1. ErrorDetails.MarshalJSON() ([]byte, error)
-1. OperationDisplay.MarshalJSON() ([]byte, error)
+#### New Struct Fields
+
+1. OperationDisplay.Resourcetest
diff --git a/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/_meta.json b/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/_meta.json
index 1226912829c1..c01c0ad7c279 100644
--- a/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/_meta.json
+++ b/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "7127d7a165de243ef1f58655f82b914aa7dd3e55",
   "readme": "/_/azure-rest-api-specs/specification/iotspaces/resource-manager/readme.md",
   "tag": "package-2017-10-preview",
   "use": "@microsoft.azure/autorest.go@2.1.183",
diff --git a/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/models.go b/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/models.go
index a7516dacc2f0..79a96c19f822 100644
--- a/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/models.go
+++ b/services/preview/iotspaces/mgmt/2017-10-01-preview/iotspaces/models.go
@@ -358,6 +358,8 @@ type OperationDisplay struct {
 	Provider *string `json:"provider,omitempty"`
 	// Resource - READ-ONLY; Resource Type: IoTSpaces
 	Resource *string `json:"resource,omitempty"`
+	// Resourcetest - READ-ONLY; Resource Type: IoTSpaces
+	Resourcetest *string `json:"resourcetest,omitempty"`
 	// Operation - READ-ONLY; Name of the operation
 	Operation *string `json:"operation,omitempty"`
 	// Description - READ-ONLY; Friendly description for the operation,