diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 79fc79396..5ad58dfd2 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -127,7 +127,7 @@ jobs:
       - name: Run Object Lock authorization and overwrite tests under race detector
         env:
           MINIO_API_REQUESTS_MAX: "10000"
-        run: go test -race -tags kqueue,dev ./cmd -run '^Test(APIPutObjectRetention|APIVersionAddressedWrite|PutObjectRetention|DirectoryObjectLock|ObjectLockOverwrite|APICopyObjectPreservesVersionAfterSuspension|MultipartNullObjectLock|PoolsObjectLockOverwrite|MultipartVersioningTransitions|PlanReview|RecoveredMultipartUpload)' -count=1 -timeout=5m
+        run: go test -race -tags kqueue,dev ./cmd -run '^Test(APIPutObjectRetention|APIVersionAddressedWrite|PutObjectRetention|DirectoryObjectLock|ObjectLockOverwrite|APICopyObjectPreservesVersionAfterSuspension|MultipartNullObjectLock|PoolsObjectLockOverwrite|ReplicaDeleteObjectLock|PoolsReplicaDeleteObjectLock|MultipartVersioningTransitions|PlanReview|RecoveredMultipartUpload)' -count=1 -timeout=5m
 
       - name: Run maintenance storage timeout and compatibility tests under race detector
         env:
diff --git a/cmd/object-handlers.go b/cmd/object-handlers.go
index 759c2dbb1..3d3c3626a 100644
--- a/cmd/object-handlers.go
+++ b/cmd/object-handlers.go
@@ -3193,9 +3193,12 @@ func (api objectAPIHandlers) DeleteObjectHandler(w http.ResponseWriter, r *http.
 	vID := opts.VersionID
 	if replica {
 		opts.SetReplicaStatus(replication.Replica)
-		if opts.VersionPurgeStatus().Empty() {
-			// opts.VersionID holds delete marker version ID to replicate and not yet present on disk
+		if opts.DeleteMarker && opts.VersionPurgeStatus().Empty() {
+			// opts.VersionID names the delete marker to replicate, not yet
+			// present here. It must not replace a stored version this site
+			// protects; a replicated purge keeps the retention check below.
 			vID = ""
+			opts.RefuseLockedOverwrite = true
 		}
 	}
 	opts.SetEvalRetentionBypassFn(func(goi ObjectInfo, gerr error) (err error) {
diff --git a/cmd/replica-delete-object-lock_test.go b/cmd/replica-delete-object-lock_test.go
new file mode 100644
index 000000000..d8accf8a1
--- /dev/null
+++ b/cmd/replica-delete-object-lock_test.go
@@ -0,0 +1,125 @@
+// Copyright (c) 2026 PGSTY
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+package cmd
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strconv"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/minio/minio/internal/amztime"
+	"github.com/minio/minio/internal/auth"
+	xhttp "github.com/minio/minio/internal/http"
+)
+
+// replicaDeleteRequest sends DELETE ?versionId= as site replication does.
+func replicaDeleteRequest(t *testing.T, router http.Handler, cred auth.Credentials, bucket, key, versionID string, marker bool) *httptest.ResponseRecorder {
+	t.Helper()
+	target := getDeleteObjectURL("", bucket, key) + "?" + url.Values{xhttp.VersionID: {versionID}}.Encode()
+	req, err := newTestSignedRequestV4(http.MethodDelete, target, 0, nil, cred.AccessKey, cred.SecretKey, map[string]string{
+		xhttp.MinIOSourceReplicationRequest: "true",
+		xhttp.AmzBucketReplicationStatus:    "REPLICA",
+		xhttp.MinIOSourceDeleteMarker:       strconv.FormatBool(marker),
+		xhttp.MinIOSourceMTime:              UTCNow().Format(time.RFC3339Nano),
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	rec := httptest.NewRecorder()
+	router.ServeHTTP(rec, req)
+	return rec
+}
+
+func replicaDeleteMarkerExists(t *testing.T, obj ObjectLayer, bucket, key, versionID string) bool {
+	t.Helper()
+	oi, err := obj.GetObjectInfo(t.Context(), bucket, key, ObjectOptions{VersionID: versionID})
+	return oi.DeleteMarker && (err == nil || isErrMethodNotAllowed(err))
+}
+
+// A replicated delete leaves a destination version under Object Lock as it
+// is, whether it purges that version or names it in a delete marker. The
+// replication credential is not a retention bypass on the destination.
+func TestReplicaDeleteObjectLock(t *testing.T) {
+	defer DetectTestLeak(t)()
+	ExecObjectLayerAPITest(ExecObjectLayerAPITestArgs{
+		t: t, endpoints: []string{"DeleteObject"},
+		objAPITest: func(obj ObjectLayer, instance, bucket string, router http.Handler, cred auth.Credentials, t *testing.T) {
+			enableBucketObjectLock(t, bucket)
+			for _, kind := range batchLockKinds {
+				for _, marker := range []bool{false, true} {
+					key := "locked/" + kind + "/marker=" + strconv.FormatBool(marker)
+					before := batchPutVersion(t, obj, bucket, key, batchLockMeta(kind))
+					rec := replicaDeleteRequest(t, router, cred, bucket, key, before.VersionID, marker)
+					if rec.Code != http.StatusBadRequest || !strings.Contains(rec.Body.String(), "WORM") {
+						t.Errorf("%s: %s: status %d, want 400 WORM: %s", instance, key, rec.Code, rec.Body.String())
+					}
+					after, err := obj.GetObjectInfo(t.Context(), bucket, key, ObjectOptions{VersionID: before.VersionID})
+					if err != nil || after.DeleteMarker || after.ETag != before.ETag {
+						t.Errorf("%s: %s: locked version was removed or replaced: %v", instance, key, err)
+					}
+				}
+			}
+
+			// Controls: replication still purges unprotected versions and
+			// writes new delete markers, also beside a locked version.
+			expired := batchLockMeta("GOVERNANCE")
+			expired[strings.ToLower(xhttp.AmzObjectLockRetainUntilDate)] = amztime.ISO8601Format(UTCNow().Add(-time.Hour))
+			for name, meta := range map[string]map[string]string{"unlocked": nil, "expired": expired} {
+				key := "purge/" + name
+				v := batchPutVersion(t, obj, bucket, key, meta)
+				if rec := replicaDeleteRequest(t, router, cred, bucket, key, v.VersionID, false); rec.Code != http.StatusNoContent {
+					t.Errorf("%s: %s: status %d, want 204: %s", instance, key, rec.Code, rec.Body.String())
+				}
+				if batchVersionExists(t, obj, bucket, key, v.VersionID) {
+					t.Errorf("%s: %s: version survived the replicated purge", instance, key)
+				}
+			}
+
+			const key = "marker/new"
+			locked := batchPutVersion(t, obj, bucket, key, batchLockMeta("COMPLIANCE"))
+			marker := mustGetUUID()
+			if rec := replicaDeleteRequest(t, router, cred, bucket, key, marker, true); rec.Code != http.StatusNoContent {
+				t.Errorf("%s: new marker: status %d, want 204: %s", instance, rec.Code, rec.Body.String())
+			}
+			if !replicaDeleteMarkerExists(t, obj, bucket, key, marker) {
+				t.Errorf("%s: the replicated delete marker was not written", instance)
+			}
+			if !batchVersionExists(t, obj, bucket, key, locked.VersionID) {
+				t.Errorf("%s: a new marker removed a locked version", instance)
+			}
+		},
+	})
+}
+
+// With more than one pool, the protected version may be in a pool other than
+// the one that holds the latest version and takes the delete marker.
+func TestPoolsReplicaDeleteObjectLock(t *testing.T) {
+	z, _ := consistencyPools(t)
+	bucket, router, err := initAPIHandlerTest(t.Context(), z, nil, MakeBucketOptions{VersioningEnabled: true, LockEnabled: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	for pool := range z.serverPools {
+		for _, marker := range []bool{false, true} {
+			key := "pool-" + strconv.Itoa(pool) + "/marker=" + strconv.FormatBool(marker)
+			before := putConsistencyObject(t, z, bucket, key, pool, "locked",
+				ObjectOptions{Versioned: true, MTime: UTCNow().Add(-time.Hour), UserDefined: batchLockMeta("COMPLIANCE")})
+			putConsistencyObject(t, z, bucket, key, 1-pool, "newer", ObjectOptions{Versioned: true, MTime: UTCNow()})
+			rec := replicaDeleteRequest(t, router, globalActiveCred, bucket, key, before.VersionID, marker)
+			if rec.Code != http.StatusBadRequest {
+				t.Errorf("%s: status %d, want 400: %s", key, rec.Code, rec.Body.String())
+			}
+			// The logical lookup also finds a marker written with this ID in
+			// the other pool, which would shadow the protected version.
+			after, gerr := z.GetObjectInfo(t.Context(), bucket, key, ObjectOptions{VersionID: before.VersionID})
+			if gerr != nil || after.DeleteMarker || after.ETag != before.ETag {
+				t.Errorf("%s: locked version was removed, replaced or shadowed: %v", key, gerr)
+			}
+		}
+	}
+}