diff --git a/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.json b/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.json
new file mode 100644
index 00000000000..8a189c74daa
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.json
@@ -0,0 +1,112 @@
+{
+  "kind": "Service",
+  "apiVersion": "v1",
+  "metadata": {
+    "name": "2",
+    "generateName": "3",
+    "namespace": "4",
+    "selfLink": "5",
+    "uid": "7",
+    "resourceVersion": "11042405498087606203",
+    "generation": 8071137005907523419,
+    "creationTimestamp": null,
+    "deletionGracePeriodSeconds": -4955867275792137171,
+    "labels": {
+      "7": "8"
+    },
+    "annotations": {
+      "9": "10"
+    },
+    "ownerReferences": [
+      {
+        "apiVersion": "11",
+        "kind": "12",
+        "name": "13",
+        "uid": "Dz廔ȇ{sŊƏp",
+        "controller": false,
+        "blockOwnerDeletion": true
+      }
+    ],
+    "finalizers": [
+      "14"
+    ],
+    "clusterName": "15",
+    "managedFields": [
+      {
+        "manager": "16",
+        "operation": "鐊唊飙Ş-U圴÷a/ɔ}摁(湗Ć]",
+        "apiVersion": "17",
+        "fieldsType": "18"
+      }
+    ]
+  },
+  "spec": {
+    "ports": [
+      {
+        "name": "19",
+        "protocol": "@Hr鯹)晿",
+        "appProtocol": "20",
+        "port": 202283346,
+        "targetPort": "21",
+        "nodePort": -474380055
+      }
+    ],
+    "selector": {
+      "22": "23"
+    },
+    "clusterIP": "24",
+    "clusterIPs": [
+      "25"
+    ],
+    "type": "鮽ort昍řČ扷5ƗǸƢ6/ʕVŚ(Ŀ",
+    "externalIPs": [
+      "26"
+    ],
+    "sessionAffinity": "甞谐颋DžS",
+    "loadBalancerIP": "27",
+    "loadBalancerSourceRanges": [
+      "28"
+    ],
+    "externalName": "29",
+    "externalTrafficPolicy": "ƏS$+½H牗洝尿",
+    "healthCheckNodePort": -1965738697,
+    "publishNotReadyAddresses": true,
+    "sessionAffinityConfig": {
+      "clientIP": {
+        "timeoutSeconds": 2072604405
+      }
+    },
+    "ipFamilies": [
+      "斬³;Ơ歿:狞夌碕ʂɭîcP$Iņɖ"
+    ],
+    "ipFamilyPolicy": "9ȫŚ",
+    "allocateLoadBalancerNodePorts": true
+  },
+  "status": {
+    "loadBalancer": {
+      "ingress": [
+        {
+          "ip": "31",
+          "hostname": "32",
+          "ports": [
+            {
+              "port": -907310967,
+              "protocol": "喂ƈ斎AO6",
+              "error": "33"
+            }
+          ]
+        }
+      ]
+    },
+    "conditions": [
+      {
+        "type": "34",
+        "status": "C",
+        "observedGeneration": -2492120148461555858,
+        "lastTransitionTime": "2392-12-09T15:37:55Z",
+        "reason": "35",
+        "message": "36"
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.pb b/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.pb
index 5c3c306d19e..0b7efa71335 100644
Binary files a/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.pb and b/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.pb differ
diff --git a/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.yaml b/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.yaml
new file mode 100644
index 00000000000..1703e3d4f78
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.20.0/core.v1.Service.after_roundtrip.yaml
@@ -0,0 +1,78 @@
+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    "9": "10"
+  clusterName: "15"
+  creationTimestamp: null
+  deletionGracePeriodSeconds: -4955867275792137171
+  finalizers:
+  - "14"
+  generateName: "3"
+  generation: 8071137005907523419
+  labels:
+    "7": "8"
+  managedFields:
+  - apiVersion: "17"
+    fieldsType: "18"
+    manager: "16"
+    operation: 鐊唊飙Ş-U圴÷a/ɔ}摁(湗Ć]
+  name: "2"
+  namespace: "4"
+  ownerReferences:
+  - apiVersion: "11"
+    blockOwnerDeletion: true
+    controller: false
+    kind: "12"
+    name: "13"
+    uid: Dz廔ȇ{sŊƏp
+  resourceVersion: "11042405498087606203"
+  selfLink: "5"
+  uid: "7"
+spec:
+  allocateLoadBalancerNodePorts: true
+  clusterIP: "24"
+  clusterIPs:
+  - "25"
+  externalIPs:
+  - "26"
+  externalName: "29"
+  externalTrafficPolicy: ƏS$+½H牗洝尿
+  healthCheckNodePort: -1965738697
+  ipFamilies:
+  - 斬³;Ơ歿:狞夌碕ʂɭîcP$Iņɖ
+  ipFamilyPolicy: 9ȫŚ
+  loadBalancerIP: "27"
+  loadBalancerSourceRanges:
+  - "28"
+  ports:
+  - appProtocol: "20"
+    name: "19"
+    nodePort: -474380055
+    port: 202283346
+    protocol: '@Hr鯹)晿'
+    targetPort: "21"
+  publishNotReadyAddresses: true
+  selector:
+    "22": "23"
+  sessionAffinity: 甞谐颋DžS
+  sessionAffinityConfig:
+    clientIP:
+      timeoutSeconds: 2072604405
+  type: 鮽ort昍řČ扷5ƗǸƢ6/ʕVŚ(Ŀ
+status:
+  conditions:
+  - lastTransitionTime: "2392-12-09T15:37:55Z"
+    message: "36"
+    observedGeneration: -2492120148461555858
+    reason: "35"
+    status: C
+    type: "34"
+  loadBalancer:
+    ingress:
+    - hostname: "32"
+      ip: "31"
+      ports:
+      - error: "33"
+        port: -907310967
+        protocol: 喂ƈ斎AO6
diff --git a/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.json b/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.json
new file mode 100644
index 00000000000..001cd739046
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.json
@@ -0,0 +1,114 @@
+{
+  "kind": "Service",
+  "apiVersion": "v1",
+  "metadata": {
+    "name": "2",
+    "generateName": "3",
+    "namespace": "4",
+    "selfLink": "5",
+    "uid": "7",
+    "resourceVersion": "11042405498087606203",
+    "generation": 8071137005907523419,
+    "creationTimestamp": null,
+    "deletionGracePeriodSeconds": -4955867275792137171,
+    "labels": {
+      "7": "8"
+    },
+    "annotations": {
+      "9": "10"
+    },
+    "ownerReferences": [
+      {
+        "apiVersion": "11",
+        "kind": "12",
+        "name": "13",
+        "uid": "Dz廔ȇ{sŊƏp",
+        "controller": false,
+        "blockOwnerDeletion": true
+      }
+    ],
+    "finalizers": [
+      "14"
+    ],
+    "clusterName": "15",
+    "managedFields": [
+      {
+        "manager": "16",
+        "operation": "鐊唊飙Ş-U圴÷a/ɔ}摁(湗Ć]",
+        "apiVersion": "17",
+        "fieldsType": "18"
+      }
+    ]
+  },
+  "spec": {
+    "ports": [
+      {
+        "name": "19",
+        "protocol": "@Hr鯹)晿",
+        "appProtocol": "20",
+        "port": 202283346,
+        "targetPort": "21",
+        "nodePort": -474380055
+      }
+    ],
+    "selector": {
+      "22": "23"
+    },
+    "clusterIP": "24",
+    "clusterIPs": [
+      "25"
+    ],
+    "type": "鮽ort昍řČ扷5ƗǸƢ6/ʕVŚ(Ŀ",
+    "externalIPs": [
+      "26"
+    ],
+    "sessionAffinity": "甞谐颋DžS",
+    "loadBalancerIP": "27",
+    "loadBalancerSourceRanges": [
+      "28"
+    ],
+    "externalName": "29",
+    "externalTrafficPolicy": "ƏS$+½H牗洝尿",
+    "healthCheckNodePort": -1965738697,
+    "publishNotReadyAddresses": true,
+    "sessionAffinityConfig": {
+      "clientIP": {
+        "timeoutSeconds": 2072604405
+      }
+    },
+    "ipFamilies": [
+      "斬³;Ơ歿:狞夌碕ʂɭîcP$Iņɖ"
+    ],
+    "ipFamilyPolicy": "9ȫŚ",
+    "allocateLoadBalancerNodePorts": true,
+    "loadBalancerClass": "31",
+    "internalTrafficPolicy": ""
+  },
+  "status": {
+    "loadBalancer": {
+      "ingress": [
+        {
+          "ip": "32",
+          "hostname": "33",
+          "ports": [
+            {
+              "port": 684408190,
+              "protocol": "ƈ斎AO6ĴC浔Ű",
+              "error": "34"
+            }
+          ]
+        }
+      ]
+    },
+    "conditions": [
+      {
+        "type": "35",
+        "status": "ž(-譵",
+        "observedGeneration": -8651056334266075769,
+        "lastTransitionTime": "2404-01-10T11:35:42Z",
+        "reason": "36",
+        "message": "37"
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.pb b/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.pb
index 502df3e5a48..1a14655d7e5 100644
Binary files a/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.pb and b/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.pb differ
diff --git a/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.yaml b/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.yaml
new file mode 100644
index 00000000000..91350d85e99
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.21.0/core.v1.Service.after_roundtrip.yaml
@@ -0,0 +1,80 @@
+apiVersion: v1
+kind: Service
+metadata:
+  annotations:
+    "9": "10"
+  clusterName: "15"
+  creationTimestamp: null
+  deletionGracePeriodSeconds: -4955867275792137171
+  finalizers:
+  - "14"
+  generateName: "3"
+  generation: 8071137005907523419
+  labels:
+    "7": "8"
+  managedFields:
+  - apiVersion: "17"
+    fieldsType: "18"
+    manager: "16"
+    operation: 鐊唊飙Ş-U圴÷a/ɔ}摁(湗Ć]
+  name: "2"
+  namespace: "4"
+  ownerReferences:
+  - apiVersion: "11"
+    blockOwnerDeletion: true
+    controller: false
+    kind: "12"
+    name: "13"
+    uid: Dz廔ȇ{sŊƏp
+  resourceVersion: "11042405498087606203"
+  selfLink: "5"
+  uid: "7"
+spec:
+  allocateLoadBalancerNodePorts: true
+  clusterIP: "24"
+  clusterIPs:
+  - "25"
+  externalIPs:
+  - "26"
+  externalName: "29"
+  externalTrafficPolicy: ƏS$+½H牗洝尿
+  healthCheckNodePort: -1965738697
+  internalTrafficPolicy: ""
+  ipFamilies:
+  - 斬³;Ơ歿:狞夌碕ʂɭîcP$Iņɖ
+  ipFamilyPolicy: 9ȫŚ
+  loadBalancerClass: "31"
+  loadBalancerIP: "27"
+  loadBalancerSourceRanges:
+  - "28"
+  ports:
+  - appProtocol: "20"
+    name: "19"
+    nodePort: -474380055
+    port: 202283346
+    protocol: '@Hr鯹)晿'
+    targetPort: "21"
+  publishNotReadyAddresses: true
+  selector:
+    "22": "23"
+  sessionAffinity: 甞谐颋DžS
+  sessionAffinityConfig:
+    clientIP:
+      timeoutSeconds: 2072604405
+  type: 鮽ort昍řČ扷5ƗǸƢ6/ʕVŚ(Ŀ
+status:
+  conditions:
+  - lastTransitionTime: "2404-01-10T11:35:42Z"
+    message: "37"
+    observedGeneration: -8651056334266075769
+    reason: "36"
+    status: ž(-譵
+    type: "35"
+  loadBalancer:
+    ingress:
+    - hostname: "33"
+      ip: "32"
+      ports:
+      - error: "34"
+        port: 684408190
+        protocol: ƈ斎AO6ĴC浔Ű