In Dynamo output has generated but model no changes was shown

Revit
1

Hi All, i am trying to change my electrical equipment label EL-1RPP-LR2 TO EL-1RPP-LR,out put was shown in dynamo nodes but revit no changes was happen please advise.

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2

You’re modifying the string but not doing anything to the element or its parameter. You need to use Element.SetParameterByName to apply the new value back to the element.