diff --git a/src/observer/table/ob_table_context.cpp b/src/observer/table/ob_table_context.cpp
index 440ada0a9..6df6c1115 100644
--- a/src/observer/table/ob_table_context.cpp
+++ b/src/observer/table/ob_table_context.cpp
@@ -479,8 +479,11 @@ int ObTableCtx::convert_lob(ObIAllocator &allocator, ObObj &obj)
   int ret = OB_SUCCESS;
 
   ObString full_data;
-  if (obj.has_lob_header()) {
+  if (obj.is_persist_lob()) {
+    // do nothing
+  } else if (obj.has_lob_header()) {
     ret = OB_ERR_UNEXPECTED;
+    LOG_USER_ERROR(OB_ERR_UNEXPECTED, "lob object should have lob header");
     LOG_WARN("object should not have lob header", K(ret), K(obj));
   } else if (OB_FAIL(ObTextStringResult::ob_convert_obj_temporay_lob(obj, allocator))) { // add lob header
     LOG_WARN("fail to add lob header to obj", K(ret), K(obj));