How to make Dff mandatory using form personalization

    Hello dears,

I have DFF field in sales order line and I need to make this field mandatory using form personalization, I defined the personalize option as below :

Trigger event : WHEN-NEW-FORM-INSTANCE

Action : Property

Object type : item

Target object : LINE.DF

Property name : REQUIRED

Value : REQUIRED

but the field doesn't convert to mandatory,

notes : I don't want to make it mandatory form DFF definition because I need to put condition on it.

Regards.