diff --git a/sdk/subscription/azure-mgmt-subscription/_meta.json b/sdk/subscription/azure-mgmt-subscription/_meta.json
index 26df39e60ba65..0d25c4e1eca61 100644
--- a/sdk/subscription/azure-mgmt-subscription/_meta.json
+++ b/sdk/subscription/azure-mgmt-subscription/_meta.json
@@ -4,7 +4,7 @@
     "@autorest/python@5.12.0",
     "@autorest/modelerfour@4.19.3"
   ],
-  "commit": "1b0a465061c68175898f8f5d27f0301f42ce994c",
+  "commit": "46ad97970c9c2050396de6d1d0f586166b8d0417",
   "repository_url": "https://github.com/Azure/azure-rest-api-specs",
   "autorest_command": "autorest specification/subscription/resource-manager/readme.md --multiapi --python --python-mode=update --python-sdks-folder=/home/vsts/work/1/s/azure-sdk-for-python/sdk --python3-only --track2 --use=@autorest/python@5.12.0 --use=@autorest/modelerfour@4.19.3 --version=3.7.2",
   "readme": "specification/subscription/resource-manager/readme.md"
diff --git a/sdk/subscription/azure-mgmt-subscription/azure/mgmt/subscription/_version.py b/sdk/subscription/azure-mgmt-subscription/azure/mgmt/subscription/_version.py
index cac9f5d10f8b7..e5754a47ce68f 100644
--- a/sdk/subscription/azure-mgmt-subscription/azure/mgmt/subscription/_version.py
+++ b/sdk/subscription/azure-mgmt-subscription/azure/mgmt/subscription/_version.py
@@ -6,4 +6,4 @@
 # Changes may cause incorrect behavior and will be lost if the code is regenerated.
 # --------------------------------------------------------------------------
 
-VERSION = "3.0.0"
+VERSION = "1.0.0b1"
diff --git a/sdk/subscription/azure-mgmt-subscription/azure/mgmt/subscription/models/_models_py3.py b/sdk/subscription/azure-mgmt-subscription/azure/mgmt/subscription/models/_models_py3.py
index 85bfda0fa46b5..740ad487b7dd3 100644
--- a/sdk/subscription/azure-mgmt-subscription/azure/mgmt/subscription/models/_models_py3.py
+++ b/sdk/subscription/azure-mgmt-subscription/azure/mgmt/subscription/models/_models_py3.py
@@ -1142,18 +1142,12 @@ def __init__(
 class SubscriptionListResult(msrest.serialization.Model):
     """Subscription list operation response.
 
-    All required parameters must be populated in order to send to Azure.
-
     :ivar value: An array of subscriptions.
     :vartype value: list[~azure.mgmt.subscription.models.Subscription]
-    :ivar next_link: Required. The URL to get the next set of results.
+    :ivar next_link: The URL to get the next set of results.
     :vartype next_link: str
     """
 
-    _validation = {
-        'next_link': {'required': True},
-    }
-
     _attribute_map = {
         'value': {'key': 'value', 'type': '[Subscription]'},
         'next_link': {'key': 'nextLink', 'type': 'str'},
@@ -1162,14 +1156,14 @@ class SubscriptionListResult(msrest.serialization.Model):
     def __init__(
         self,
         *,
-        next_link: str,
         value: Optional[List["Subscription"]] = None,
+        next_link: Optional[str] = None,
         **kwargs
     ):
         """
         :keyword value: An array of subscriptions.
         :paramtype value: list[~azure.mgmt.subscription.models.Subscription]
-        :keyword next_link: Required. The URL to get the next set of results.
+        :keyword next_link: The URL to get the next set of results.
         :paramtype next_link: str
         """
         super(SubscriptionListResult, self).__init__(**kwargs)