diff --git a/IRaCIS.Core.Application/Service/ImageAndDoc/DownloadAndUploadService.cs b/IRaCIS.Core.Application/Service/ImageAndDoc/DownloadAndUploadService.cs
index d29387c05..998e6c8bc 100644
--- a/IRaCIS.Core.Application/Service/ImageAndDoc/DownloadAndUploadService.cs
+++ b/IRaCIS.Core.Application/Service/ImageAndDoc/DownloadAndUploadService.cs
@@ -259,7 +259,7 @@ namespace IRaCIS.Core.Application.Service.ImageAndDoc
                 t.StudyInstanceUid,
                 t.SubjectId,
                 SubejectCode = t.VisitTask.IsAnalysisCreate ? t.VisitTask.BlindSubjectCode : t.Subject.Code,
-                t.VisitTaskId
+                VisitTaskId=(Guid?)t.VisitTaskId
             }).ToList();
 
             var notAllowedUidList2 = _dicomStudyRepository.Where(t => t.TrialId == inCommand.TrialId && inCommand.StudyInstanceUidList.Contains(t.StudyInstanceUid)).Select(t => new
@@ -267,7 +267,7 @@ namespace IRaCIS.Core.Application.Service.ImageAndDoc
                 t.StudyInstanceUid,
                 t.SubjectId,
                 SubejectCode = t.Subject.Code,
-                VisitTaskId = Guid.Empty
+                VisitTaskId = (Guid?)null
             }).ToList();
 
             var notAllowedUidList = notAllowedUidList1.Union(notAllowedUidList2);
@@ -283,7 +283,7 @@ namespace IRaCIS.Core.Application.Service.ImageAndDoc
                     //同一个subject 同一份影响
                     if (findStudy.SubejectCode == inCommand.SubjectCode && findStudy.SubjectId == inCommand.SubjectId)
                     {
-                        if (inCommand.VisitTaskId != null && findStudy.VisitTaskId != Guid.Empty && findStudy.VisitTaskId != inCommand.VisitTaskId)
+                        if (inCommand.VisitTaskId != null && findStudy.VisitTaskId != null && findStudy.VisitTaskId != inCommand.VisitTaskId)
                         {
                             result.Add(new TaskStudyArchiveConfirmResult() { StudyInstanceUid = studyUid, IsAllowReUpload = false, IsAllowUpload = false });
                         }