brotherton-erpnext/erpnext/patches/v14_0/discount_accounting_separation.py

import frappe


def execute():
	data = frappe.db.sql(
		'select value from tabSingles where doctype="Accounts Settings" and field="enable_discount_accounting"'
	)
	discount_account = data and int(data[0][0]) or 0
	if discount_account:
		for doctype in ["Buying Settings", "Selling Settings"]:
			frappe.db.set_value(doctype, doctype, "enable_discount_accounting", 1, update_modified=False)