diff --git a/Common/Production/ProductionUiCordonel/ProductionProcesses/EolProcesses/CheckFinalParametrization.cs b/Common/Production/ProductionUiCordonel/ProductionProcesses/EolProcesses/CheckFinalParametrization.cs
index e3a08504..e0a96779 100644
--- a/Common/Production/ProductionUiCordonel/ProductionProcesses/EolProcesses/CheckFinalParametrization.cs
+++ b/Common/Production/ProductionUiCordonel/ProductionProcesses/EolProcesses/CheckFinalParametrization.cs
@@ -82,11 +82,13 @@ namespace Xylem.Common.Production.ProductionUiCordonel.ProductionProcesses.EolPr
                 // Execute final read after reboot
                 RegisterRestorer.OnProcessUpdate += ProcessUpdate_Handler;
                 var retValBol = RegisterRestorer.FinalReadRegisters(CancellationToken);
-                
+                RegisterRestorer.OnProcessUpdate -= ProcessUpdate_Handler;
+               
                 // Exit if meanwhile cancellation is required
                 if (CancellationToken.IsCancellationRequested)
                     return CancellationProcedure();
 
+                RegisterRestorer.OnProcessUpdate += ProcessUpdate_Handler;
                 retValBol &= RegisterRestorer.CompareRegisters(CancellationToken);
                 RegisterRestorer.OnProcessUpdate -= ProcessUpdate_Handler;