diff --git a/services/datamigration/mgmt/2018-04-19/datamigration/CHANGELOG.md b/services/datamigration/mgmt/2018-04-19/datamigration/CHANGELOG.md
index 52911e4cc5e4..a1ecf841edb0 100644
--- a/services/datamigration/mgmt/2018-04-19/datamigration/CHANGELOG.md
+++ b/services/datamigration/mgmt/2018-04-19/datamigration/CHANGELOG.md
@@ -1,2 +1,2 @@
-# Change History
+# Unreleased
 
diff --git a/services/datamigration/mgmt/2018-04-19/datamigration/_meta.json b/services/datamigration/mgmt/2018-04-19/datamigration/_meta.json
index 4c7c423f5d09..5ada57e7513d 100644
--- a/services/datamigration/mgmt/2018-04-19/datamigration/_meta.json
+++ b/services/datamigration/mgmt/2018-04-19/datamigration/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "e8c359d8821038f133695c9b1f4cf40d330cbc80",
   "readme": "/_/azure-rest-api-specs/specification/datamigration/resource-manager/readme.md",
   "tag": "package-2018-04-19",
   "use": "@microsoft.azure/autorest.go@2.1.187",
diff --git a/services/preview/datamigration/mgmt/2017-11-15-preview/datamigration/CHANGELOG.md b/services/preview/datamigration/mgmt/2017-11-15-preview/datamigration/CHANGELOG.md
index 52911e4cc5e4..a1ecf841edb0 100644
--- a/services/preview/datamigration/mgmt/2017-11-15-preview/datamigration/CHANGELOG.md
+++ b/services/preview/datamigration/mgmt/2017-11-15-preview/datamigration/CHANGELOG.md
@@ -1,2 +1,2 @@
-# Change History
+# Unreleased
 
diff --git a/services/preview/datamigration/mgmt/2017-11-15-preview/datamigration/_meta.json b/services/preview/datamigration/mgmt/2017-11-15-preview/datamigration/_meta.json
index 975457678a9f..4b1e94f58e78 100644
--- a/services/preview/datamigration/mgmt/2017-11-15-preview/datamigration/_meta.json
+++ b/services/preview/datamigration/mgmt/2017-11-15-preview/datamigration/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "e8c359d8821038f133695c9b1f4cf40d330cbc80",
   "readme": "/_/azure-rest-api-specs/specification/datamigration/resource-manager/readme.md",
   "tag": "package-2017-11-15-preview",
   "use": "@microsoft.azure/autorest.go@2.1.187",
diff --git a/services/preview/datamigration/mgmt/2018-03-31-preview/datamigration/CHANGELOG.md b/services/preview/datamigration/mgmt/2018-03-31-preview/datamigration/CHANGELOG.md
index 52911e4cc5e4..a1ecf841edb0 100644
--- a/services/preview/datamigration/mgmt/2018-03-31-preview/datamigration/CHANGELOG.md
+++ b/services/preview/datamigration/mgmt/2018-03-31-preview/datamigration/CHANGELOG.md
@@ -1,2 +1,2 @@
-# Change History
+# Unreleased
 
diff --git a/services/preview/datamigration/mgmt/2018-03-31-preview/datamigration/_meta.json b/services/preview/datamigration/mgmt/2018-03-31-preview/datamigration/_meta.json
index d35b721237e8..50699d83cfa4 100644
--- a/services/preview/datamigration/mgmt/2018-03-31-preview/datamigration/_meta.json
+++ b/services/preview/datamigration/mgmt/2018-03-31-preview/datamigration/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "e8c359d8821038f133695c9b1f4cf40d330cbc80",
   "readme": "/_/azure-rest-api-specs/specification/datamigration/resource-manager/readme.md",
   "tag": "package-2018-03-31-preview",
   "use": "@microsoft.azure/autorest.go@2.1.187",
diff --git a/services/preview/datamigration/mgmt/2018-07-15-preview/datamigration/CHANGELOG.md b/services/preview/datamigration/mgmt/2018-07-15-preview/datamigration/CHANGELOG.md
index 52911e4cc5e4..a1ecf841edb0 100644
--- a/services/preview/datamigration/mgmt/2018-07-15-preview/datamigration/CHANGELOG.md
+++ b/services/preview/datamigration/mgmt/2018-07-15-preview/datamigration/CHANGELOG.md
@@ -1,2 +1,2 @@
-# Change History
+# Unreleased
 
diff --git a/services/preview/datamigration/mgmt/2018-07-15-preview/datamigration/_meta.json b/services/preview/datamigration/mgmt/2018-07-15-preview/datamigration/_meta.json
index f19f7cd05d04..19cd96179611 100644
--- a/services/preview/datamigration/mgmt/2018-07-15-preview/datamigration/_meta.json
+++ b/services/preview/datamigration/mgmt/2018-07-15-preview/datamigration/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "3c764635e7d442b3e74caf593029fcd440b3ef82",
+  "commit": "e8c359d8821038f133695c9b1f4cf40d330cbc80",
   "readme": "/_/azure-rest-api-specs/specification/datamigration/resource-manager/readme.md",
   "tag": "package-2018-07-15-preview",
   "use": "@microsoft.azure/autorest.go@2.1.187",
diff --git a/services/preview/datamigration/mgmt/2021-10-30-preview/datamigration/CHANGELOG.md b/services/preview/datamigration/mgmt/2021-10-30-preview/datamigration/CHANGELOG.md
index 52911e4cc5e4..a1ecf841edb0 100644
--- a/services/preview/datamigration/mgmt/2021-10-30-preview/datamigration/CHANGELOG.md
+++ b/services/preview/datamigration/mgmt/2021-10-30-preview/datamigration/CHANGELOG.md
@@ -1,2 +1,2 @@
-# Change History
+# Unreleased
 
diff --git a/services/preview/datamigration/mgmt/2021-10-30-preview/datamigration/_meta.json b/services/preview/datamigration/mgmt/2021-10-30-preview/datamigration/_meta.json
index 023d55fd8960..b60482785f78 100644
--- a/services/preview/datamigration/mgmt/2021-10-30-preview/datamigration/_meta.json
+++ b/services/preview/datamigration/mgmt/2021-10-30-preview/datamigration/_meta.json
@@ -1,5 +1,5 @@
 {
-  "commit": "25a8355d4094595edf9b58b13e8c95b0b0c9c50c",
+  "commit": "e8c359d8821038f133695c9b1f4cf40d330cbc80",
   "readme": "/_/azure-rest-api-specs/specification/datamigration/resource-manager/readme.md",
   "tag": "package-preview-2021-10",
   "use": "@microsoft.azure/autorest.go@2.1.187",