address copilot comments

Author: nguyenmin

specification/containerservice/resource-manager/Microsoft.ContainerService/fleet/examples/2026-06-02-preview/AutoUpgradeProfileOperations_GenerateUpdateRun.json

@@ -14,7 +14,6 @@
         "id": "lfte"
       }
     },
-    "204": {},
     "202": {
       "headers": {
         "Azure-AsyncOperation": "https://contoso.com/operationstatus"

specification/containerservice/resource-manager/Microsoft.ContainerService/fleet/main.tsp

@@ -74,7 +74,7 @@ enum Versions {
   @armCommonTypesVersion(Azure.ResourceManager.CommonTypes.Versions.v5)
   v2026_05_01_preview: "2026-05-01-preview",
 
-  @doc("Azure Kubernetes Fleet Manager api version 2026-06-01-preview.")
+  @doc("Azure Kubernetes Fleet Manager api version 2026-06-02-preview.")
   @armCommonTypesVersion(Azure.ResourceManager.CommonTypes.Versions.v5)
   v2026_06_02_preview: "2026-06-02-preview",
 }

specification/containerservice/resource-manager/Microsoft.ContainerService/fleet/preview/2026-06-02-preview/examples/AutoUpgradeProfileOperations_GenerateUpdateRun.json

@@ -14,7 +14,6 @@
         "id": "lfte"
       }
     },
-    "204": {},
     "202": {
       "headers": {
         "Azure-AsyncOperation": "https://contoso.com/operationstatus"

specification/containerservice/resource-manager/Microsoft.ContainerService/fleet/preview/2026-06-02-preview/fleets.json

@@ -852,9 +852,6 @@
               }
             }
           },
-          "204": {
-            "description": "Azure operation completed successfully."
-          },
           "default": {
             "description": "An unexpected error response.",
             "schema": {
@@ -3470,6 +3467,11 @@
             "type": "string"
           },
           "readOnly": true
+        },
+        "lastTriggerMessage": {
+          "type": "string",
+          "description": "Additional information about the last trigger attempt.",
+          "readOnly": true
         }
       }
     },

specification/containerservice/resource-manager/Microsoft.ContainerService/fleet/update/autoupgradeprofile.tsp

@@ -183,6 +183,11 @@ model AutoUpgradeProfileStatus {
   @doc("The target Kubernetes version or node image versions of the last trigger.")
   @visibility(Lifecycle.Read)
   lastTriggerUpgradeVersions?: string[];
+
+  @doc("Additional information about the last trigger attempt.")
+  @visibility(Lifecycle.Read)
+  @added(Versions.v2026_06_02_preview)
+  lastTriggerMessage?: string;
 }
 
 @doc("AutoUpgradeLastTriggerStatus is the status of the last AutoUpgrade trigger (attempt to automatically create and start UpdateRun when there are new released versions) of an auto upgrade profile.")
@@ -207,7 +212,7 @@ interface AutoUpgradeProfileOperations {
   generateUpdateRun is Azure.ResourceManager.ArmResourceActionAsync<
     AutoUpgradeProfile,
     void,
-    GenerateUpdateRunResponse,
+    GenerateResponse,
     BaseParameters<AutoUpgradeProfile>,
     LroHeaders = ArmAsyncOperationHeader<FinalResult = GenerateResponse> &
       ArmLroLocationHeader<FinalResult = GenerateResponse> &
@@ -222,12 +227,3 @@ model GenerateResponse {
   @doc("The ARM resource id of the generated UpdateRun. e.g.: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ContainerService/fleets/{fleetName}/updateRuns/{updateRunName}'.")
   id: string;
 }
-
-@added(Versions.v2025_03_01)
-@doc("Azure operation completed successfully.")
-union GenerateUpdateRunResponse {
-  GenerateResponse,
-
-  @added(Versions.v2026_06_02_preview)
-  ArmNoContentResponse,
-}