Script to set additional field of request from requester field

Script to set additional field of request from requester field

Hello everyone,
i would like to have a script that, on form creation, populate an additional field of the request with the same value of an additional field of the requester.
I have configured the form rule on creation and added custom action "execute custom script".
I have tried different scripts following this guide but i cant get it to work

Both additional field are single-line:
      Request Field = UDF_CHAR2
      Requester Field = UDF_CHAR1

Regards

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