diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/CHANGELOG.md b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/CHANGELOG.md
index 856993c973bd..422134e9c9d9 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/CHANGELOG.md
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/CHANGELOG.md
@@ -1,14 +1,10 @@
 # Release History
 
-## 1.2.0-beta.2 (Unreleased)
+## 1.2.0-beta.2 (2026-04-06)
 
 ### Features Added
 
-### Breaking Changes
-
-### Bugs Fixed
-
-### Other Changes
+- Upgraded api-version to '2025-08-01-preview'.
 
 ## 1.2.0-beta.1 (2025-08-12)
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/AutoUpgradeProfileCollection.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/AutoUpgradeProfileCollection.cs
index d4f79ece2470..be849c75baf7 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/AutoUpgradeProfileCollection.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/AutoUpgradeProfileCollection.cs
@@ -54,7 +54,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ContainerServiceFleetResource.ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/AutoUpgradeProfileResource.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/AutoUpgradeProfileResource.cs
index b7440c6e65f3..a5657f9f2ac4 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/AutoUpgradeProfileResource.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/AutoUpgradeProfileResource.cs
@@ -92,7 +92,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetCollection.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetCollection.cs
index 20041c1908d4..ed7862f8d9c2 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetCollection.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetCollection.cs
@@ -51,7 +51,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ResourceGroupResource.ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceGroupResource.ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceGroupResource.ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetGateCollection.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetGateCollection.cs
index 4638cb936577..364f1ce95159 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetGateCollection.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetGateCollection.cs
@@ -50,7 +50,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ContainerServiceFleetResource.ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetGateResource.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetGateResource.cs
index d1b81e7a5207..557f7bc033f3 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetGateResource.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetGateResource.cs
@@ -88,7 +88,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetManagedNamespaceCollection.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetManagedNamespaceCollection.cs
index 8369203dc6d0..4fe088569079 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetManagedNamespaceCollection.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetManagedNamespaceCollection.cs
@@ -50,7 +50,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ContainerServiceFleetResource.ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetManagedNamespaceResource.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetManagedNamespaceResource.cs
index b046b1591865..64511a85984c 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetManagedNamespaceResource.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetManagedNamespaceResource.cs
@@ -90,7 +90,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetMemberCollection.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetMemberCollection.cs
index 4b4f9b2c38dc..5ebedbf77f25 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetMemberCollection.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetMemberCollection.cs
@@ -50,7 +50,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ContainerServiceFleetResource.ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetMemberResource.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetMemberResource.cs
index c1144819d6a1..4497ad338627 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetMemberResource.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetMemberResource.cs
@@ -88,7 +88,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetResource.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetResource.cs
index b819d0207d93..407be6260c0d 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetResource.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetResource.cs
@@ -89,7 +89,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetUpdateRunCollection.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetUpdateRunCollection.cs
index b22dc80360b2..cb6a35ddf9cf 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetUpdateRunCollection.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetUpdateRunCollection.cs
@@ -50,7 +50,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ContainerServiceFleetResource.ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetUpdateRunResource.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetUpdateRunResource.cs
index c2b43ffdbe1a..1ebc6ed144ae 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetUpdateRunResource.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/ContainerServiceFleetUpdateRunResource.cs
@@ -88,7 +88,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/FleetUpdateStrategyCollection.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/FleetUpdateStrategyCollection.cs
index b1a870bde683..bd45fc7baaa2 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/FleetUpdateStrategyCollection.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/FleetUpdateStrategyCollection.cs
@@ -50,7 +50,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ContainerServiceFleetResource.ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ContainerServiceFleetResource.ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/FleetUpdateStrategyResource.cs b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/FleetUpdateStrategyResource.cs
index 50a5ef336d97..5bd9feaa3bd0 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/FleetUpdateStrategyResource.cs
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/src/Generated/FleetUpdateStrategyResource.cs
@@ -87,7 +87,7 @@ internal static void ValidateResourceId(ResourceIdentifier id)
         {
             if (id.ResourceType != ResourceType)
             {
-                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), id);
+                throw new ArgumentException(string.Format("Invalid resource type {0} expected {1}", id.ResourceType, ResourceType), nameof(id));
             }
         }
 
diff --git a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/tsp-location.yaml b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/tsp-location.yaml
index 0c6af6a3add1..db57db11599f 100644
--- a/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/tsp-location.yaml
+++ b/sdk/fleet/Azure.ResourceManager.ContainerServiceFleet/tsp-location.yaml
@@ -1,4 +1,6 @@
-directory: specification/containerservice/resource-manager/Microsoft.ContainerService/fleet/
-commit: 0b5796a12cf5dca2f6b8ec3dce4566806497986c
+directory: specification/containerservice/resource-manager/Microsoft.ContainerService/fleet
+commit: 5b8c01eed693ebeb0e8677310b649901fac47314
 repo: Azure/azure-rest-api-specs
-emitterPackageJsonPath: eng/azure-typespec-http-client-csharp-mgmt-emitter-package.json
+additionalDirectories: 
+
+emitterPackageJsonPath: eng/azure-typespec-http-client-csharp-mgmt-emitter-package.json
\ No newline at end of file