diff --git a/IRaCIS.Core.Application/Service/WorkLoad/DTO/DoctorWorkLoadViewModel.cs b/IRaCIS.Core.Application/Service/WorkLoad/DTO/DoctorWorkLoadViewModel.cs
index d5d26d41e..53cb4fc80 100644
--- a/IRaCIS.Core.Application/Service/WorkLoad/DTO/DoctorWorkLoadViewModel.cs
+++ b/IRaCIS.Core.Application/Service/WorkLoad/DTO/DoctorWorkLoadViewModel.cs
@@ -268,7 +268,7 @@ namespace IRaCIS.Application.Contracts
 
         public Guid EnrollId { get; set; }
         public DateTime? OutEnrollTime { get; set; }
-        public Guid AgreementId { get; set; }
+        public Guid? AgreementId { get; set; }
 
         public string AgreementPath { get; set; } = String.Empty;
 
diff --git a/IRaCIS.Core.Domain/Trial/Enroll.cs b/IRaCIS.Core.Domain/Trial/Enroll.cs
index c56428a2d..b54da8b61 100644
--- a/IRaCIS.Core.Domain/Trial/Enroll.cs
+++ b/IRaCIS.Core.Domain/Trial/Enroll.cs
@@ -25,7 +25,7 @@ namespace IRaCIS.Core.Domain.Models
 
         public Guid DoctorId { get; set; }
         public Guid TrialId { get; set; }
-        public Guid AttachmentId { get; set; } = Guid.Empty;
+        public Guid? AttachmentId { get; set; } 
         public EnrollStatus EnrollStatus { get; set; }
 
         public decimal? AdjustmentMultiple { get; set; }