diff --git a/schemas/2021-09-01-preview/Microsoft.Dashboard.json b/schemas/2021-09-01-preview/Microsoft.Dashboard.json
index d4153251a8..ee8048de7f 100644
--- a/schemas/2021-09-01-preview/Microsoft.Dashboard.json
+++ b/schemas/2021-09-01-preview/Microsoft.Dashboard.json
@@ -98,19 +98,6 @@
     "ManagedGrafanaProperties": {
       "type": "object",
       "properties": {
-        "autoGeneratedDomainNameLabelScope": {
-          "oneOf": [
-            {
-              "type": "string",
-              "enum": [
-                "TenantReuse"
-              ]
-            },
-            {
-              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
-            }
-          ]
-        },
         "provisioningState": {
           "oneOf": [
             {