diff --git a/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/CHANGELOG.md b/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/CHANGELOG.md
index 062680483de9..0fc3db1b56c3 100644
--- a/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/CHANGELOG.md
+++ b/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/CHANGELOG.md
@@ -1,5 +1,5 @@
-Generated from https://github.com/Azure/azure-rest-api-specs/tree/a1eee0489c374782a934ec1f093abd16fa7718ca/specification/cosmos-db/resource-manager/readme.md tag: `package-2020-09`
+Generated from https://github.com/Azure/azure-rest-api-specs/tree/ad232b543edd2f97c64484a7a1a60e4298ea34a5/specification/cosmos-db/resource-manager/readme.md tag: `package-2020-09`
 
-Code generator @microsoft.azure/autorest.go@2.1.171
+Code generator 
 
 
diff --git a/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/documentdbapi/interfaces.go b/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/documentdbapi/interfaces.go
index 3f9d9de9d514..8426c827cae5 100644
--- a/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/documentdbapi/interfaces.go
+++ b/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/documentdbapi/interfaces.go
@@ -19,7 +19,6 @@ package documentdbapi
 
 import (
 	"context"
-
 	"github.com/Azure/azure-sdk-for-go/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb"
 	"github.com/Azure/go-autorest/autorest"
 )
diff --git a/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/models.go b/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/models.go
index b1fdee2ba745..3c0bec7a5df6 100644
--- a/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/models.go
+++ b/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/models.go
@@ -20,13 +20,12 @@ package documentdb
 import (
 	"context"
 	"encoding/json"
-	"net/http"
-
 	"github.com/Azure/go-autorest/autorest"
 	"github.com/Azure/go-autorest/autorest/azure"
 	"github.com/Azure/go-autorest/autorest/date"
 	"github.com/Azure/go-autorest/autorest/to"
 	"github.com/Azure/go-autorest/tracing"
+	"net/http"
 )
 
 // The package's fully qualified name.
diff --git a/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/version.go b/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/version.go
index b7f6bee513b9..00c313d6f3b4 100644
--- a/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/version.go
+++ b/services/preview/cosmos-db/mgmt/2020-09-01-preview/documentdb/version.go
@@ -21,7 +21,7 @@ import "github.com/Azure/azure-sdk-for-go/version"
 
 // UserAgent returns the UserAgent string to use when sending http.Requests.
 func UserAgent() string {
-	return "Azure-SDK-For-Go/" + Version() + " documentdb/2020-09"
+	return "Azure-SDK-For-Go/" + Version() + " documentdb/2020-09-01-preview"
 }
 
 // Version returns the semantic version (see http://semver.org) of the client.