diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTaskService.cs
index 8772d71de..b61c4a87c 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTaskService.cs
@@ -255,7 +255,7 @@ namespace IRaCIS.Application.Services
                     TaskBlindName = x.TaskBlindName,
                     SubjectId = x.SubjectId,
                     ReadingCategory = x.ReadingCategory,
-                    VisistId = x.SourceSubjectVisitId != null ? x.SourceSubjectVisitId :default(Guid) ,
+                    VisistId = x.SourceSubjectVisitId != null ? x.SourceSubjectVisitId.Value :default(Guid) ,
                     VisitNum = x.VisitTaskNum,
 
                 }).FirstOrDefaultAsync();