How to uncheck this kind of restriction

i need to customize those fields and i cant

You cannot edit property for the standard fieds. Perhaps you should try creating Property Setter for this field directly. P.S. it’s a work-around.

but there is no way to disable that restriction if it selfhost?

If this validation is in the .js, then you might be able to over-write it via Custom Script.

Oh thank you,

But dont know how to do that will try to find out

This code works in my vm

frappe.ui.form.on("Delivery Note", "refresh", function(frm) { frm.set_df_property("po_no", "read_only", frm.doc.__islocal ? 0 : 0); });

it works thanks