diff --git a/IRaCIS.Core.Application/Service/TrialSiteUser/TrialService.cs b/IRaCIS.Core.Application/Service/TrialSiteUser/TrialService.cs
index 35a02e814..3c1357226 100644
--- a/IRaCIS.Core.Application/Service/TrialSiteUser/TrialService.cs
+++ b/IRaCIS.Core.Application/Service/TrialSiteUser/TrialService.cs
@@ -21,6 +21,7 @@ namespace IRaCIS.Core.Application.Service
         IRepository<EnrollDetail> _enrollDetailRepository,
         IRepository<Dictionary> _dictionaryRepository,
         IRepository<Enroll> _enrollRepository,
+        IOSSService _oSSService,
         IRepository<Workload> _workloadRepository,
         IRepository<Sponsor> _sponsorRepository,
         IRepository<VisitStage> _visitStageRepository,
@@ -568,6 +569,9 @@ namespace IRaCIS.Core.Application.Service
                 await _repository.BatchDeleteNoTrackingAsync<VisitTaskReReading>(t => t.OriginalReReadingTask.TrialId == trialId);
                 await _repository.BatchDeleteNoTrackingAsync<VisitTask>(t => t.TrialId == trialId);
                 await _repository.BatchDeleteNoTrackingAsync<TrialStateChange>(t => t.TrialId == trialId);
+
+
+                await _oSSService.DeleteFromPrefix(trialId.ToString());
                 #endregion