diff --git a/internal/packages/consensus/babylon-checkpoint/indexer/batch_sync.go b/internal/packages/consensus/babylon-checkpoint/indexer/batch_sync.go
index 002f484..752eb04 100644
--- a/internal/packages/consensus/babylon-checkpoint/indexer/batch_sync.go
+++ b/internal/packages/consensus/babylon-checkpoint/indexer/batch_sync.go
@@ -61,7 +61,7 @@ func (idx *CheckpointIndexer) batchSync(lastIndexPointerEpoch int64) (
 	idx.Infof("last finalized epoch(current_epoch -1) is %d and last index pointer epoch is %d", lastFinalizedEpoch, lastIndexPointerEpoch)
 	idx.Infof("new sync epoch: %d", newIndexerPointerEpoch)
 
-	for epoch := range lastFinalizedEpoch + 1 {
+	for epoch := int64(0); epoch <= lastFinalizedEpoch; epoch++ {
 		if epoch <= 1 {
 			continue
 		}
diff --git a/internal/packages/consensus/babylon-checkpoint/indexer/indexer_test.go b/internal/packages/consensus/babylon-checkpoint/indexer/indexer_test.go
index 5399da6..44804d8 100644
--- a/internal/packages/consensus/babylon-checkpoint/indexer/indexer_test.go
+++ b/internal/packages/consensus/babylon-checkpoint/indexer/indexer_test.go
@@ -104,7 +104,7 @@ func TestSyncEpoch(t *testing.T) {
 	assert.NoError(t, err)
 
 	// for loop until current epoch
-	for epoch := range currentEpoch {
+	for epoch := int64(0); epoch < int64(currentEpoch)+1; epoch++ {
 		if epoch == 0 {
 			t.Log("skip the zero epoch")
 			continue