diff --git a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
index e7c209fed..05d11336e 100644
--- a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
+++ b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
@@ -549,7 +549,7 @@ namespace IRaCIS.Core.Application.Service.Reading.Dto
 
     public class ChangeTableQuestion
     {
-        public Guid RowId { get; set; }
+        public Guid? RowId { get; set; }
 
         public Guid QuestionId { get; set; }
 
diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
index f706209d8..28668cced 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
@@ -366,7 +366,7 @@ namespace IRaCIS.Core.Application.Service
 
             }
 
-            foreach (var item in inDto.TableQuestionAnswer)
+            foreach (var item in inDto.TableQuestionAnswer.Where(x => x.RowId != null))
             {
 
                 if (tableQuestionAnswerList.Any(x => x.QuestionId == item.QuestionId && x.RowId == item.RowId && x.TableQuestionId == item.TableQuestionId))