diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTaskService.cs
index bf5da5a3a..5990bca63 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTaskService.cs
@@ -127,6 +127,9 @@ namespace IRaCIS.Application.Services
             rowAnswer.SplitOrMergeType = SplitOrMergeType.Split;
             rowAnswer.SplitRowId = rowAnswer.Id;
             rowAnswer.Id = NewId.NextGuid();
+            rowAnswer.InstanceId = null;
+            rowAnswer.SeriesId = null;
+            rowAnswer.MeasureData = string.Empty;
 
             List<QuestionMark?> needRemoveMark = new List<QuestionMark?>()
             {