Text field in dynamic stamp

To be placed in calculation script of the Text2 field:

var answer="";
while (!/^\d{6}$/.test(answer) && answer!=null) {
	var answer=app.response({
		cQuestion: "Enter a 6-digit number.",
		cTitle: "Reference",
		cLabel: "MAXIMO #",
		});
}
if (answer!=null) event.value=answer;
else event.value="";

Stamps don't work like that. Once you apply them all the fields in them become flattened. You have to prompt the user to enter the value for this field when the stamp is applied, and then populate it into the field. After the stamp is applied it can't be edited any longer. You can only delete the stamp and re-apply it using a new value.