diff --git a/CompanyManagment.Application/InstitutionContractApplication.cs b/CompanyManagment.Application/InstitutionContractApplication.cs
index 6434a78b..756b26fa 100644
--- a/CompanyManagment.Application/InstitutionContractApplication.cs
+++ b/CompanyManagment.Application/InstitutionContractApplication.cs
@@ -1610,7 +1610,7 @@ public class InstitutionContractApplication : IInstitutionContractApplication
         institutionContract.SetSigningType(signingType);
         var previousInstitutionContract = await _institutionContractRepository
             .GetPreviousContract(institutionContract.id);
-        previousInstitutionContract.DeActive();
+        previousInstitutionContract?.DeActive();
         ReActiveAllAfterCreateNew(institutionContract.ContractingPartyId);
         await _institutionContractRepository.SaveChangesAsync();
         return op.Succcedded();