diff --git a/api/openapi-spec/swagger.json b/api/openapi-spec/swagger.json
index b6315f4d5e4..9f518b5fac7 100644
--- a/api/openapi-spec/swagger.json
+++ b/api/openapi-spec/swagger.json
@@ -2826,8 +2826,7 @@
       },
       "required": [
         "selector",
-        "template",
-        "serviceName"
+        "template"
       ],
       "type": "object"
     },
diff --git a/api/openapi-spec/v3/apis__apps__v1_openapi.json b/api/openapi-spec/v3/apis__apps__v1_openapi.json
index f45eb000bb1..9c7e1c1875b 100644
--- a/api/openapi-spec/v3/apis__apps__v1_openapi.json
+++ b/api/openapi-spec/v3/apis__apps__v1_openapi.json
@@ -1171,8 +1171,7 @@
         },
         "required": [
           "selector",
-          "template",
-          "serviceName"
+          "template"
         ],
         "type": "object"
       },
diff --git a/pkg/generated/openapi/zz_generated.openapi.go b/pkg/generated/openapi/zz_generated.openapi.go
index 765246a719f..caad5638a15 100644
--- a/pkg/generated/openapi/zz_generated.openapi.go
+++ b/pkg/generated/openapi/zz_generated.openapi.go
@@ -8244,7 +8244,7 @@ func schema_k8sio_api_apps_v1_StatefulSetSpec(ref common.ReferenceCallback) comm
 						},
 					},
 				},
-				Required: []string{"selector", "template", "serviceName"},
+				Required: []string{"selector", "template"},
 			},
 		},
 		Dependencies: []string{
@@ -9396,7 +9396,7 @@ func schema_k8sio_api_apps_v1beta1_StatefulSetSpec(ref common.ReferenceCallback)
 						},
 					},
 				},
-				Required: []string{"template", "serviceName"},
+				Required: []string{"template"},
 			},
 		},
 		Dependencies: []string{
@@ -11109,7 +11109,7 @@ func schema_k8sio_api_apps_v1beta2_StatefulSetSpec(ref common.ReferenceCallback)
 						},
 					},
 				},
-				Required: []string{"selector", "template", "serviceName"},
+				Required: []string{"selector", "template"},
 			},
 		},
 		Dependencies: []string{
diff --git a/staging/src/k8s.io/api/apps/v1/generated.proto b/staging/src/k8s.io/api/apps/v1/generated.proto
index 453035ca2e0..ac57a15d3e3 100644
--- a/staging/src/k8s.io/api/apps/v1/generated.proto
+++ b/staging/src/k8s.io/api/apps/v1/generated.proto
@@ -716,6 +716,7 @@ message StatefulSetSpec {
   // the network identity of the set. Pods get DNS/hostnames that follow the
   // pattern: pod-specific-string.serviceName.default.svc.cluster.local
   // where "pod-specific-string" is managed by the StatefulSet controller.
+  // +optional
   optional string serviceName = 5;
 
   // podManagementPolicy controls how pods are created during initial scale up,
diff --git a/staging/src/k8s.io/api/apps/v1beta1/generated.proto b/staging/src/k8s.io/api/apps/v1beta1/generated.proto
index 24abd5b8ba4..74b3ce54999 100644
--- a/staging/src/k8s.io/api/apps/v1beta1/generated.proto
+++ b/staging/src/k8s.io/api/apps/v1beta1/generated.proto
@@ -462,6 +462,7 @@ message StatefulSetSpec {
   // the network identity of the set. Pods get DNS/hostnames that follow the
   // pattern: pod-specific-string.serviceName.default.svc.cluster.local
   // where "pod-specific-string" is managed by the StatefulSet controller.
+  // +optional
   optional string serviceName = 5;
 
   // podManagementPolicy controls how pods are created during initial scale up,
diff --git a/staging/src/k8s.io/api/apps/v1beta2/generated.proto b/staging/src/k8s.io/api/apps/v1beta2/generated.proto
index 735eed7106e..b0d4e3f0894 100644
--- a/staging/src/k8s.io/api/apps/v1beta2/generated.proto
+++ b/staging/src/k8s.io/api/apps/v1beta2/generated.proto
@@ -761,6 +761,7 @@ message StatefulSetSpec {
   // the network identity of the set. Pods get DNS/hostnames that follow the
   // pattern: pod-specific-string.serviceName.default.svc.cluster.local
   // where "pod-specific-string" is managed by the StatefulSet controller.
+  // +optional
   optional string serviceName = 5;
 
   // podManagementPolicy controls how pods are created during initial scale up,