diff --git a/OptionPanel/MachiningOptionPanel/OperationExpander/OperationExpanderVM.vb b/OptionPanel/MachiningOptionPanel/OperationExpander/OperationExpanderVM.vb
index b3a147b..e86861e 100644
--- a/OptionPanel/MachiningOptionPanel/OperationExpander/OperationExpanderVM.vb
+++ b/OptionPanel/MachiningOptionPanel/OperationExpander/OperationExpanderVM.vb
@@ -874,7 +874,7 @@ Public Class OperationExpanderVM
       If IsNothing(m_SelectedOperation) Or m_SelectedOperation.m_Type = MCH_OY.NONE Or
          m_SelectedOperation.m_Type = MCH_OY.DISP Then Return
       ' faccio la copia
-      Dim MachiningId As Integer = EgtCopyMachining(m_SelectedOperation.Name & "_1", m_SelectedOperation.Name)
+      Dim MachiningId As Integer = EgtCopyMachining(m_SelectedOperation.Name, m_SelectedOperation.Name)
       ' Se è abilitata l'opzione
       If Not OptionModule.m_bNewMachiningIsLastOne Then
          ' Sposto la lavorazione aggiunta subito dopo quella appena selezionata