diff --git a/specification/signalr/resource-manager/Microsoft.SignalRService/stable/2021-10-01/signalr.json b/specification/signalr/resource-manager/Microsoft.SignalRService/stable/2021-10-01/signalr.json
index 2e2df3d8edab..05b771eb6b90 100644
--- a/specification/signalr/resource-manager/Microsoft.SignalRService/stable/2021-10-01/signalr.json
+++ b/specification/signalr/resource-manager/Microsoft.SignalRService/stable/2021-10-01/signalr.json
@@ -1923,38 +1923,22 @@
         "primaryKey": {
           "description": "The primary access key.",
           "type": "string",
-          "x-ms-secret": true,
-          "x-ms-mutability": [
-            "create",
-            "update"
-          ]
+          "x-ms-secret": true
         },
         "secondaryKey": {
           "description": "The secondary access key.",
           "type": "string",
-          "x-ms-secret": true,
-          "x-ms-mutability": [
-            "create",
-            "update"
-          ]
+          "x-ms-secret": true
         },
         "primaryConnectionString": {
           "description": "Connection string constructed via the primaryKey",
           "type": "string",
-          "x-ms-secret": true,
-          "x-ms-mutability": [
-            "create",
-            "update"
-          ]
+          "x-ms-secret": true
         },
         "secondaryConnectionString": {
           "description": "Connection string constructed via the secondaryKey",
           "type": "string",
-          "x-ms-secret": true,
-          "x-ms-mutability": [
-            "create",
-            "update"
-          ]
+          "x-ms-secret": true
         }
       }
     },
diff --git a/specification/webpubsub/resource-manager/Microsoft.SignalRService/stable/2021-10-01/webpubsub.json b/specification/webpubsub/resource-manager/Microsoft.SignalRService/stable/2021-10-01/webpubsub.json
index f010b3ca4d39..dad3011b9e43 100644
--- a/specification/webpubsub/resource-manager/Microsoft.SignalRService/stable/2021-10-01/webpubsub.json
+++ b/specification/webpubsub/resource-manager/Microsoft.SignalRService/stable/2021-10-01/webpubsub.json
@@ -2377,38 +2377,22 @@
         "primaryKey": {
           "description": "The primary access key.",
           "type": "string",
-          "x-ms-secret": true,
-          "x-ms-mutability": [
-            "create",
-            "update"
-          ]
+          "x-ms-secret": true
         },
         "secondaryKey": {
           "description": "The secondary access key.",
           "type": "string",
-          "x-ms-secret": true,
-          "x-ms-mutability": [
-            "create",
-            "update"
-          ]
+          "x-ms-secret": true
         },
         "primaryConnectionString": {
           "description": "Connection string constructed via the primaryKey",
           "type": "string",
-          "x-ms-secret": true,
-          "x-ms-mutability": [
-            "create",
-            "update"
-          ]
+          "x-ms-secret": true
         },
         "secondaryConnectionString": {
           "description": "Connection string constructed via the secondaryKey",
           "type": "string",
-          "x-ms-secret": true,
-          "x-ms-mutability": [
-            "create",
-            "update"
-          ]
+          "x-ms-secret": true
         }
       }
     },