Adding new field with "Select" type

I want to add a new field in a doctype which has “Select” type.
It give me an error “‘list’ object has no attribute ‘split’” when I try to migrate my site.

new_field = {
                "label": "custom:promoType",
                "fieldname": "promotype",
                "fieldtype": "Select",
                "options":["FAD","PD","BUY1GET1","BUYXGETY"]
            }

Please check the example.

oh… i see… thanks NCP