diff --git a/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/CHANGELOG.md b/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/CHANGELOG.md
index f66af821ec3d..a1ecf841edb0 100644
--- a/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/CHANGELOG.md
+++ b/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/CHANGELOG.md
@@ -1,12 +1,2 @@
-# Change History
+# Unreleased
 
-## Additive Changes
-
-### New Funcs
-
-1. AzureEntityResource.MarshalJSON() ([]byte, error)
-1. Display.MarshalJSON() ([]byte, error)
-1. ErrorDefinition.MarshalJSON() ([]byte, error)
-1. HardwareProfile.MarshalJSON() ([]byte, error)
-1. ProxyResource.MarshalJSON() ([]byte, error)
-1. Resource.MarshalJSON() ([]byte, error)
diff --git a/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/_meta.json b/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/_meta.json
index 56bd46701020..5f5de4b317b1 100644
--- a/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/_meta.json
+++ b/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "e0a8cac0a598a364ce155d47065567dd020b1244",
   "readme": "/_/azure-rest-api-specs/specification/baremetalinfrastructure/resource-manager/readme.md",
   "tag": "package-2020-08-06-preview",
   "use": "@microsoft.azure/autorest.go@2.1.183",
diff --git a/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/azurebaremetalinstances.go b/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/azurebaremetalinstances.go
index 9a40abb9fb24..612213e997ac 100644
--- a/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/azurebaremetalinstances.go
+++ b/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/azurebaremetalinstances.go
@@ -52,8 +52,7 @@ func (client AzureBareMetalInstancesClient) Delete(ctx context.Context, resource
 			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: resourceGroupName,
 			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}}}); err != nil {
+				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("baremetalinfrastructure.AzureBareMetalInstancesClient", "Delete", err.Error())
 	}
 
@@ -139,8 +138,7 @@ func (client AzureBareMetalInstancesClient) Get(ctx context.Context, resourceGro
 			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: resourceGroupName,
 			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}}}); err != nil {
+				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("baremetalinfrastructure.AzureBareMetalInstancesClient", "Get", err.Error())
 	}
 
@@ -224,8 +222,7 @@ func (client AzureBareMetalInstancesClient) List(ctx context.Context, resourceGr
 			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: resourceGroupName,
 			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}}}); err != nil {
+				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("baremetalinfrastructure.AzureBareMetalInstancesClient", "List", err.Error())
 	}
 
@@ -471,8 +468,7 @@ func (client AzureBareMetalInstancesClient) Restart(ctx context.Context, resourc
 			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: resourceGroupName,
 			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}}}); err != nil {
+				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("baremetalinfrastructure.AzureBareMetalInstancesClient", "Restart", err.Error())
 	}
 
@@ -558,8 +554,7 @@ func (client AzureBareMetalInstancesClient) Shutdown(ctx context.Context, resour
 			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: resourceGroupName,
 			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}}}); err != nil {
+				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("baremetalinfrastructure.AzureBareMetalInstancesClient", "Shutdown", err.Error())
 	}
 
@@ -645,8 +640,7 @@ func (client AzureBareMetalInstancesClient) Start(ctx context.Context, resourceG
 			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: resourceGroupName,
 			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}}}); err != nil {
+				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("baremetalinfrastructure.AzureBareMetalInstancesClient", "Start", err.Error())
 	}
 
@@ -734,8 +728,7 @@ func (client AzureBareMetalInstancesClient) Update(ctx context.Context, resource
 			Constraints: []validation.Constraint{{Target: "client.SubscriptionID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
 		{TargetValue: resourceGroupName,
 			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
-				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\w\._\(\)]+$`, Chain: nil}}}}); err != nil {
+				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil}}}}); err != nil {
 		return result, validation.NewError("baremetalinfrastructure.AzureBareMetalInstancesClient", "Update", err.Error())
 	}
 
diff --git a/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/models.go b/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/models.go
index a3badb17b23a..b1ff1dcf990c 100644
--- a/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/models.go
+++ b/services/preview/baremetalinfrastructure/mgmt/2020-08-06-preview/baremetalinfrastructure/models.go
@@ -599,7 +599,7 @@ type Operation struct {
 	Name *string `json:"name,omitempty"`
 	// Display - Displayed AzureBareMetal operation information
 	Display *Display `json:"display,omitempty"`
-	// IsDataAction - indicates whether an operation is a data action or not.
+	// IsDataAction - READ-ONLY; indicates whether an operation is a data action or not.
 	IsDataAction *bool `json:"isDataAction,omitempty"`
 }
 
@@ -609,9 +609,6 @@ func (o Operation) MarshalJSON() ([]byte, error) {
 	if o.Display != nil {
 		objectMap["display"] = o.Display
 	}
-	if o.IsDataAction != nil {
-		objectMap["isDataAction"] = o.IsDataAction
-	}
 	return json.Marshal(objectMap)
 }