diff --git a/lightning/restore/checksum.go b/lightning/restore/checksum.go
index 2dc802ee9bc4b..918ba182c242a 100644
--- a/lightning/restore/checksum.go
+++ b/lightning/restore/checksum.go
@@ -248,10 +248,8 @@ type tikvChecksumManager struct {
 // newTiKVChecksumManager return a new tikv checksum manager
 func newTiKVChecksumManager(client kv.Client, pdClient pd.Client) *tikvChecksumManager {
 	return &tikvChecksumManager{
-		client: client,
-		manager: gcTTLManager{
-			pdClient: pdClient,
-		},
+		client:  client,
+		manager: newGCTTLManager(pdClient),
 	}
 }
 
diff --git a/lightning/restore/checksum_test.go b/lightning/restore/checksum_test.go
index dfe450bddd151..c3b78cfb9bbe4 100644
--- a/lightning/restore/checksum_test.go
+++ b/lightning/restore/checksum_test.go
@@ -5,6 +5,7 @@ import (
 	"database/sql"
 	"fmt"
 	"sort"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -229,8 +230,8 @@ func (c *testPDClient) currentSafePoint() uint64 {
 }
 
 func (c *testPDClient) UpdateServiceGCSafePoint(ctx context.Context, serviceID string, ttl int64, safePoint uint64) (uint64, error) {
-	if serviceID == "" {
-		panic("service ID must not be empty")
+	if !strings.HasPrefix(serviceID, "lightning") {
+		panic("service ID must start with 'lightning'")
 	}
 	atomic.AddInt32(&c.count, 1)
 	c.Lock()
@@ -312,9 +313,9 @@ func (s *checksumSuite) TestGcTTLManagerMulti(c *C) {
 func (s *checksumSuite) TestPdServiceID(c *C) {
 	pdCli := &testPDClient{}
 	gcTTLManager1 := newGCTTLManager(pdCli)
-	c.Assert(gcTTLManager1.serviceID != "", IsTrue)
+	c.Assert(gcTTLManager1.serviceID, Matches, "lightning-.*")
 	gcTTLManager2 := newGCTTLManager(pdCli)
-	c.Assert(gcTTLManager2.serviceID != "", IsTrue)
+	c.Assert(gcTTLManager2.serviceID, Matches, "lightning-.*")
 
 	c.Assert(gcTTLManager1.serviceID != gcTTLManager2.serviceID, IsTrue)
 }