diff --git a/specification/common-types/resource-management/v4/customermanagedkeys.json b/specification/common-types/resource-management/v4/customermanagedkeys.json
index d403a8e2c035..a9be420dcaad 100644
--- a/specification/common-types/resource-management/v4/customermanagedkeys.json
+++ b/specification/common-types/resource-management/v4/customermanagedkeys.json
@@ -51,7 +51,6 @@
             },
             "userAssignedIdentityResourceId": {
               "type": "string",
-              "format": "arm-id",
               "description": "user assigned identity to use for accessing key encryption key Url. Ex: /subscriptions/fa5fc227-a624-475e-b696-cdd604c735bc/resourceGroups/<resource group>/providers/Microsoft.ManagedIdentity/userAssignedIdentities/myId. Mutually exclusive with identityType systemAssignedIdentity and delegatedResourceIdentity."
             },
             "delegatedIdentityClientId": {
diff --git a/specification/common-types/resource-management/v4/types.json b/specification/common-types/resource-management/v4/types.json
index 4cc37c07aea0..158f9cea8196 100644
--- a/specification/common-types/resource-management/v4/types.json
+++ b/specification/common-types/resource-management/v4/types.json
@@ -14,7 +14,6 @@
         "id": {
           "readOnly": true,
           "type": "string",
-          "format": "arm-id",
           "description": "Fully qualified resource ID for the resource. E.g. \"/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/{resourceProviderNamespace}/{resourceType}/{resourceName}\""
         },
         "name": {