diff --git a/IRaCIS.Core.Application/Service/Doctor/DoctorListService.cs b/IRaCIS.Core.Application/Service/Doctor/DoctorListService.cs
index 6440c6423..819173880 100644
--- a/IRaCIS.Core.Application/Service/Doctor/DoctorListService.cs
+++ b/IRaCIS.Core.Application/Service/Doctor/DoctorListService.cs
@@ -302,8 +302,6 @@ namespace IRaCIS.Core.Application.Service
                 .Where(x => x.TrialId == inQuery.TrialId && x.EnrollStatus >= EnrollStatus.InviteIntoGroup);
             var enrollStateList = await query
                  .ProjectTo<DoctorStateModelDTO>(_mapper.ConfigurationProvider).ToListAsync();
-            enrollStateList = enrollStateList.GroupBy(e => e.DoctorId)
-               .Select(g => g.OrderByDescending(e => e.OptTime).FirstOrDefault()).ToList();
 
             enrollStateList = enrollStateList
                .WhereIf(inQuery.OptStartTime != null, x => x.OptTime >= inQuery.OptStartTime)