Turn Transport ID obligatory in VL02N

Hi experts.

I have a requeriment to make the Transport ID (LIKP-TRAID) in VL02N obligatory.

I found the BADI LE_SHP_DELIVERY_PROC, that have the CHANGE_FIELD_ATTRIBUTES method, but with it, I can't the obligatory attribute.. only input, invisible and others attibutes.

Anyone know a way to make it?

Thank you.