diff --git a/Company.Domain/InstitutionContractAmendmentTempAgg/InstitutionContractAmendmentTemp.cs b/Company.Domain/InstitutionContractAmendmentTempAgg/InstitutionContractAmendmentTemp.cs
index 7c13616a..bac4cd56 100644
--- a/Company.Domain/InstitutionContractAmendmentTempAgg/InstitutionContractAmendmentTemp.cs
+++ b/Company.Domain/InstitutionContractAmendmentTempAgg/InstitutionContractAmendmentTemp.cs
@@ -79,6 +79,7 @@ public class InstitutionContractAmendmentTempPrevWorkshop
         CurrentWorkshopId = currentWorkshopId;
     }
 
+    [BsonRepresentation(BsonType.String)]
     public Guid Id { get; set; }
 
     public long CurrentWorkshopId { get; private set; }