diff --git a/services/preview/portal/mgmt/2015-08-01-preview/portal/CHANGELOG.md b/services/preview/portal/mgmt/2015-08-01-preview/portal/CHANGELOG.md
index 52911e4cc5e4..a1ecf841edb0 100644
--- a/services/preview/portal/mgmt/2015-08-01-preview/portal/CHANGELOG.md
+++ b/services/preview/portal/mgmt/2015-08-01-preview/portal/CHANGELOG.md
@@ -1,2 +1,2 @@
-# Change History
+# Unreleased
 
diff --git a/services/preview/portal/mgmt/2015-08-01-preview/portal/_meta.json b/services/preview/portal/mgmt/2015-08-01-preview/portal/_meta.json
index a6ea688a1692..7d09be964e11 100644
--- a/services/preview/portal/mgmt/2015-08-01-preview/portal/_meta.json
+++ b/services/preview/portal/mgmt/2015-08-01-preview/portal/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "734f94d7c3d69a5801505b2a35976783946cd614",
   "readme": "/_/azure-rest-api-specs/specification/portal/resource-manager/readme.md",
   "tag": "package-2015-08-01-preview",
   "use": "@microsoft.azure/autorest.go@2.1.187",
diff --git a/services/preview/portal/mgmt/2015-08-01-preview/portal/models.go b/services/preview/portal/mgmt/2015-08-01-preview/portal/models.go
index bd96ba536944..963ce5a2e159 100644
--- a/services/preview/portal/mgmt/2015-08-01-preview/portal/models.go
+++ b/services/preview/portal/mgmt/2015-08-01-preview/portal/models.go
@@ -307,8 +307,7 @@ func NewDashboardListResultPage(cur DashboardListResult, getNextPage func(contex
 type DashboardParts struct {
 	// Position - The dashboard's part position.
 	Position *DashboardPartsPosition `json:"position,omitempty"`
-	// Metadata - The dashboard part's metadata.
-	Metadata map[string]interface{} `json:"metadata"`
+	Metadata map[string]interface{}  `json:"metadata"`
 }
 
 // MarshalJSON is the custom marshaler for DashboardParts.
diff --git a/services/preview/portal/mgmt/2018-10-01-preview/portal/CHANGELOG.md b/services/preview/portal/mgmt/2018-10-01-preview/portal/CHANGELOG.md
index 52911e4cc5e4..a1ecf841edb0 100644
--- a/services/preview/portal/mgmt/2018-10-01-preview/portal/CHANGELOG.md
+++ b/services/preview/portal/mgmt/2018-10-01-preview/portal/CHANGELOG.md
@@ -1,2 +1,2 @@
-# Change History
+# Unreleased
 
diff --git a/services/preview/portal/mgmt/2018-10-01-preview/portal/_meta.json b/services/preview/portal/mgmt/2018-10-01-preview/portal/_meta.json
index 558d8fa13858..a4a455d80e2d 100644
--- a/services/preview/portal/mgmt/2018-10-01-preview/portal/_meta.json
+++ b/services/preview/portal/mgmt/2018-10-01-preview/portal/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "734f94d7c3d69a5801505b2a35976783946cd614",
   "readme": "/_/azure-rest-api-specs/specification/portal/resource-manager/readme.md",
   "tag": "package-2018-10-01-preview",
   "use": "@microsoft.azure/autorest.go@2.1.187",
diff --git a/services/preview/portal/mgmt/2018-10-01-preview/portal/models.go b/services/preview/portal/mgmt/2018-10-01-preview/portal/models.go
index 5d6752aee54c..df33fa74f08f 100644
--- a/services/preview/portal/mgmt/2018-10-01-preview/portal/models.go
+++ b/services/preview/portal/mgmt/2018-10-01-preview/portal/models.go
@@ -307,8 +307,7 @@ func NewDashboardListResultPage(cur DashboardListResult, getNextPage func(contex
 type DashboardParts struct {
 	// Position - The dashboard's part position.
 	Position *DashboardPartsPosition `json:"position,omitempty"`
-	// Metadata - The dashboard part's metadata.
-	Metadata map[string]interface{} `json:"metadata"`
+	Metadata map[string]interface{}  `json:"metadata"`
 }
 
 // MarshalJSON is the custom marshaler for DashboardParts.
diff --git a/services/preview/portal/mgmt/2019-01-01-preview/portal/CHANGELOG.md b/services/preview/portal/mgmt/2019-01-01-preview/portal/CHANGELOG.md
index 52911e4cc5e4..a1ecf841edb0 100644
--- a/services/preview/portal/mgmt/2019-01-01-preview/portal/CHANGELOG.md
+++ b/services/preview/portal/mgmt/2019-01-01-preview/portal/CHANGELOG.md
@@ -1,2 +1,2 @@
-# Change History
+# Unreleased
 
diff --git a/services/preview/portal/mgmt/2019-01-01-preview/portal/_meta.json b/services/preview/portal/mgmt/2019-01-01-preview/portal/_meta.json
index f5ca196a2453..f07baa38ae4d 100644
--- a/services/preview/portal/mgmt/2019-01-01-preview/portal/_meta.json
+++ b/services/preview/portal/mgmt/2019-01-01-preview/portal/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "734f94d7c3d69a5801505b2a35976783946cd614",
   "readme": "/_/azure-rest-api-specs/specification/portal/resource-manager/readme.md",
   "tag": "package-2019-01-01-preview",
   "use": "@microsoft.azure/autorest.go@2.1.187",
diff --git a/services/preview/portal/mgmt/2019-01-01-preview/portal/models.go b/services/preview/portal/mgmt/2019-01-01-preview/portal/models.go
index 3aea1c0ca90f..862aa75fbba4 100644
--- a/services/preview/portal/mgmt/2019-01-01-preview/portal/models.go
+++ b/services/preview/portal/mgmt/2019-01-01-preview/portal/models.go
@@ -413,8 +413,7 @@ func NewDashboardListResultPage(cur DashboardListResult, getNextPage func(contex
 type DashboardParts struct {
 	// Position - The dashboard's part position.
 	Position *DashboardPartsPosition `json:"position,omitempty"`
-	// Metadata - The dashboard part's metadata.
-	Metadata map[string]interface{} `json:"metadata"`
+	Metadata map[string]interface{}  `json:"metadata"`
 }
 
 // MarshalJSON is the custom marshaler for DashboardParts.
@@ -559,8 +558,8 @@ func (pd *PatchableDashboard) UnmarshalJSON(body []byte) error {
 	return nil
 }
 
-// ProxyResource the resource model definition for an Azure Resource Manager proxy resource. It will have
-// everything other than required location and tags
+// ProxyResource the resource model definition for a Azure Resource Manager proxy resource. It will not
+// have tags and a location
 type ProxyResource struct {
 	// ID - READ-ONLY; Fully qualified resource ID for the resource. Ex - /subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/{resourceProviderNamespace}/{resourceType}/{resourceName}
 	ID *string `json:"id,omitempty"`
@@ -775,6 +774,7 @@ func NewResourceProviderOperationListPage(cur ResourceProviderOperationList, get
 }
 
 // TrackedResource the resource model definition for an Azure Resource Manager tracked top level resource
+// which has 'tags' and a 'location'
 type TrackedResource struct {
 	// Tags - Resource tags.
 	Tags map[string]*string `json:"tags"`