def execute():
import webnotes
from webnotes.modules import reload_doc
webnotes.conn.sql("delete from `tabField Mapper Detail` where from_field = 'transaction_date' and parent in ('Sales Order-Delivery Note', 'Purchase Order-Purchase Receipt')")
reload_doc('stock', 'DocType Mapper', 'Sales Order-Delivery Note')
reload_doc('stock', 'DocType Mapper', 'Purchase Order-Purchase Receipt')