diff --git a/api/types/load_traffic.go b/api/types/load_traffic.go
index d5d9a3b..5b7a331 100644
--- a/api/types/load_traffic.go
+++ b/api/types/load_traffic.go
@@ -4,11 +4,7 @@
 package types
 
 import (
-	"encoding/json"
 	"fmt"
-	"strings"
-
-	apitypes "k8s.io/apimachinery/pkg/types"
 )
 
 // ContentType represents the format of response.
@@ -165,10 +161,6 @@ type RequestPatch struct {
 	Name string `json:"name" yaml:"name"`
 	// KeySpaceSize is used to generate random number as name's suffix.
 	KeySpaceSize int `json:"keySpaceSize" yaml:"keySpaceSize"`
-	// PatchType is the type of patch, e.g. "json", "merge", "strategic-merge".
-	PatchType string `json:"patchType" yaml:"patchType"`
-	// Body is the request body, for fields to be changed.
-	Body string `json:"body" yaml:"body"`
 }
 
 // RequestGetPodLog defines GetLog request for target pod.
@@ -339,21 +331,6 @@ func (m *KubeGroupVersionResource) Validate() error {
 	return nil
 }
 
-// GetPatchType returns the Kubernetes PatchType for a given patch type string.
-// Returns the PatchType and an error if the patch type is invalid.
-func GetPatchType(patchType string) (apitypes.PatchType, bool) {
-	switch patchType {
-	case "json":
-		return apitypes.JSONPatchType, true
-	case "merge":
-		return apitypes.MergePatchType, true
-	case "strategic-merge":
-		return apitypes.StrategicMergePatchType, true
-	default:
-		return "", false
-	}
-}
-
 // Validate validates RequestPatch type.
 func (r *RequestPatch) Validate() error {
 	if err := r.KubeGroupVersionResource.Validate(); err != nil {
@@ -362,24 +339,9 @@ func (r *RequestPatch) Validate() error {
 	if r.Name == "" {
 		return fmt.Errorf("name is required")
 	}
-	if r.Body == "" {
-		return fmt.Errorf("body is required")
-	}
-
-	// Validate patch type
-	_, ok := GetPatchType(r.PatchType)
-	if !ok {
-		return fmt.Errorf("unknown patch type: %s (valid types: json, merge, strategic-merge)", r.PatchType)
-	}
-
-	// Validate JSON body and trim it
-	trimmed := strings.TrimSpace(r.Body)
-	if !json.Valid([]byte(trimmed)) {
-		return fmt.Errorf("invalid JSON in patch body: %q", r.Body)
+	if r.Resource == "" {
+		return fmt.Errorf("resource is required")
 	}
-
-	r.Body = trimmed // Store the trimmed body
-
 	return nil
 }
 
diff --git a/contrib/internal/manifests/loadprofile/read_update.yaml b/contrib/internal/manifests/loadprofile/read_update.yaml
index bdb43c9..11e33cc 100644
--- a/contrib/internal/manifests/loadprofile/read_update.yaml
+++ b/contrib/internal/manifests/loadprofile/read_update.yaml
@@ -20,15 +20,6 @@ loadProfile:
           version: v1
           resource: configmaps
           namespace: default
-          patchType: merge
           name: runkperf-cm-kperf-read-update
           keySpaceSize: 100
-          body: |
-            {
-              "metadata": {
-                "labels": {
-                  "test-label": "mutation-test"
-                }
-              }
-            }
         shares: 50
diff --git a/request/random.go b/request/random.go
index 32012e0..b488b16 100644
--- a/request/random.go
+++ b/request/random.go
@@ -61,7 +61,7 @@ func NewWeightedRandomRequests(spec *types.LoadProfileSpec) (*WeightedRandomRequ
 		case r.GetPodLog != nil:
 			builder = newRequestGetPodLogBuilder(r.GetPodLog, spec.MaxRetries)
 		case r.Patch != nil:
-			builder = newRequestPatchBuilder(r.Patch, "", spec.MaxRetries)
+			builder = newRequestPatchBuilder(r.Patch, spec.MaxRetries)
 		case r.PostDel != nil:
 			builder = newRequestPostDelBuilder(r.PostDel, "", spec.MaxRetries)
 		default:
@@ -363,33 +363,25 @@ func (b *requestGetPodLogBuilder) Build(cli rest.Interface) Requester {
 }
 
 type requestPatchBuilder struct {
-	version         schema.GroupVersion
-	resource        string
-	resourceVersion string
-	namespace       string
-	name            string
-	keySpaceSize    int
-	patchType       apitypes.PatchType
-	body            interface{}
-	maxRetries      int
+	version      schema.GroupVersion
+	resource     string
+	namespace    string
+	name         string
+	keySpaceSize int
+	maxRetries   int
 }
 
-func newRequestPatchBuilder(src *types.RequestPatch, resourceVersion string, maxRetries int) *requestPatchBuilder {
-	patchType, _ := types.GetPatchType(src.PatchType)
-
+func newRequestPatchBuilder(src *types.RequestPatch, maxRetries int) *requestPatchBuilder {
 	return &requestPatchBuilder{
 		version: schema.GroupVersion{
 			Group:   src.Group,
 			Version: src.Version,
 		},
-		resource:        src.Resource,
-		resourceVersion: resourceVersion,
-		namespace:       src.Namespace,
-		name:            src.Name,
-		keySpaceSize:    src.KeySpaceSize,
-		patchType:       patchType,
-		body:            []byte(src.Body),
-		maxRetries:      maxRetries,
+		resource:     src.Resource,
+		namespace:    src.Namespace,
+		name:         src.Name,
+		keySpaceSize: src.KeySpaceSize,
+		maxRetries:   maxRetries,
 	}
 }
 
@@ -413,11 +405,13 @@ func (b *requestPatchBuilder) Build(cli rest.Interface) Requester {
 	finalName := fmt.Sprintf("%s-%d", b.name, suffix)
 	comps = append(comps, b.resource, finalName)
 
+	body := fmt.Sprintf(`{"metadata":{"annotations":{"force-update":"%d-%d"}}}`, suffix, time.Now().UnixNano())
+
 	return &DiscardRequester{
 		BaseRequester: BaseRequester{
 			method: "PATCH",
-			req: cli.Patch(b.patchType).AbsPath(comps...).
-				Body(b.body).
+			req: cli.Patch(apitypes.MergePatchType).AbsPath(comps...).
+				Body([]byte(body)).
 				MaxRetries(b.maxRetries),
 		},
 	}