diff --git a/MP-TAB/DettaglioMacchina.aspx b/MP-TAB/DettaglioMacchina.aspx
index 00529321..7c4629ee 100644
--- a/MP-TAB/DettaglioMacchina.aspx
+++ b/MP-TAB/DettaglioMacchina.aspx
@@ -21,7 +21,7 @@
               </asp:LinkButton>
             </p>
           </div>
-          <div id="collapse01" class="collapse" aria-labelledby="headingThree" data-parent="#accordion">
+          <div id="collapse01" class="collapse" aria-labelledby="headingThree">
             <div class="card-body p-1">
                 <uc2:mod_dettaglioProd ID="mod_dettaglioProd2" runat="server" />
             </div>