diff --git a/src/rootserver/backup/ob_backup_data_set_task_mgr.cpp b/src/rootserver/backup/ob_backup_data_set_task_mgr.cpp
index 0c51857c2..722548a5b 100644
--- a/src/rootserver/backup/ob_backup_data_set_task_mgr.cpp
+++ b/src/rootserver/backup/ob_backup_data_set_task_mgr.cpp
@@ -491,14 +491,7 @@ int ObBackupSetTaskMgr::backup_user_meta_()
   } else if (OB_FAIL(do_backup_root_key_())) {
     LOG_WARN("[DATA_BACKUP]failed to do backup root key", K(ret));
   } else if (ls_task.count() == finish_cnt) {
-    ROOTSERVICE_EVENT_ADD("backup_data",
-                          "before_backup_data",
-                          "tenant_id",
-                          job_attr_->tenant_id_,
-                          "job_id",
-                          job_attr_->job_id_,
-                          "task_id",
-                          set_task_attr_.task_id_);
+    ROOTSERVICE_EVENT_ADD("backup_data", "before_backup_data");
     share::SCN consistent_scn;
     bool need_change_meta_turn = false;
     if (OB_FAIL(check_need_change_meta_turn_(ls_task, need_change_meta_turn))) {
@@ -549,7 +542,6 @@ int ObBackupSetTaskMgr::calc_consistent_scn_(ObIArray<share::ObBackupLSTaskAttr>
 {
   int ret = OB_SUCCESS;
   consistent_scn.set_min();
-  DEBUG_SYNC(BEFORE_CALC_CONSISTENT_SCN);
   // let consistent_scn be the biggest max_tablet_checkpoint_scn_ of all the ls and the cur gts.
   if (OB_FAIL(ObBackupDataScheduler::get_backup_scn(*sql_proxy_, job_attr_->tenant_id_, true, consistent_scn))) {
     LOG_WARN("failed to get backup scn", K(ret), "tenant_id", job_attr_->tenant_id_);
@@ -745,14 +737,7 @@ int ObBackupSetTaskMgr::merge_tablet_to_ls_info_(const share::SCN &consistent_sc
   } else if (OB_FAIL(generate_ls_tasks_(ls_ids, type))) {
     LOG_WARN("failed to generate ls tasks", K(ret), K(ls_ids), K(type));
   } else {
-    ROOTSERVICE_EVENT_ADD("backup_data",
-                          "after_backup_consistent_scn",
-                          "tenant_id",
-                          job_attr_->tenant_id_,
-                          "job_id",
-                          job_attr_->job_id_,
-                          "task_id",
-                          set_task_attr_.task_id_);
+    ROOTSERVICE_EVENT_ADD("backup_data", "after_backup_consistent_scn");
   }
   if (trans_.is_started()) {
     int tmp_ret = OB_SUCCESS;
diff --git a/src/share/ob_debug_sync_point.h b/src/share/ob_debug_sync_point.h
index da35fb946..4da2775e6 100755
--- a/src/share/ob_debug_sync_point.h
+++ b/src/share/ob_debug_sync_point.h
@@ -567,7 +567,6 @@ class ObString;
     ACT(BEFORE_SEND_PARALLEL_CREATE_TABLE,)\
     ACT(BEFORE_DROP_TENANT,)\
     ACT(BEFORE_WAIT_SYS_LS_END_SCN,)\
-    ACT(BEFORE_CALC_CONSISTENT_SCN,)\
     ACT(MAX_DEBUG_SYNC_POINT,)
 
 DECLARE_ENUM(ObDebugSyncPoint, debug_sync_point, OB_DEBUG_SYNC_POINT_DEF);
diff --git a/src/storage/high_availability/ob_storage_ha_tablet_builder.cpp b/src/storage/high_availability/ob_storage_ha_tablet_builder.cpp
index 7e4ab8e45..cee20e45a 100644
--- a/src/storage/high_availability/ob_storage_ha_tablet_builder.cpp
+++ b/src/storage/high_availability/ob_storage_ha_tablet_builder.cpp
@@ -2812,6 +2812,10 @@ int ObStorageHATabletBuilderUtil::check_need_merge_tablet_meta_(
     need_merge = true;
   } else if (tablet->get_tablet_meta().clog_checkpoint_scn_ >= src_tablet_meta->clog_checkpoint_scn_) {
     need_merge = false;
+  } else if (OB_FAIL(check_remote_logical_sstable_exist(tablet, is_exist))) {
+    LOG_WARN("failed to check remote logical sstable exist", K(ret), KPC(tablet));
+  } else if (!is_exist) {
+    need_merge = false;
   } else {
     need_merge = true;
   }