diff --git a/IRaCIS.Core.Application/Service/WorkLoad/DoctorWorkloadService.cs b/IRaCIS.Core.Application/Service/WorkLoad/DoctorWorkloadService.cs
index d22694297..a6a59aa48 100644
--- a/IRaCIS.Core.Application/Service/WorkLoad/DoctorWorkloadService.cs
+++ b/IRaCIS.Core.Application/Service/WorkLoad/DoctorWorkloadService.cs
@@ -133,7 +133,7 @@ namespace IRaCIS.Application.Services
             if (_visitTaskRepository.Where(t => t.TrialId == enroll.TrialId && t.DoctorUserId == enroll.DoctorUserId && t.TaskAllocationState == TaskAllocationState.Allocated && t.TrialReadingCriterionId == inDto.TrialReadingCriterionId).Any())
             {
 
-                var readingCategoryList = await _enrollReadingCategoryRepository.Where(t => t.EnrollId == inDto.EnrollId && t.TrialReadingCriterionId == inDto.TrialReadingCriterionId).Select(t => t.ReadingCategory).ToListAsync();
+                var readingCategoryList = await _enrollReadingCategoryRepository.Where(t => t.EnrollId == inDto.EnrollId && t.TrialReadingCriterionId == inDto.TrialReadingCriterionId).Select(t => t.ReadingCategory).Distinct().ToListAsync();
 
                 if (readingCategoryList.Except(inDto.ReadingCategorys).Count() > 0)
                 {