fix: rate changing on the deliver note

(cherry picked from commit 6f40849d55)

erpnext/controllers/accounts_controller.py

@@ -823,11 +823,15 @@ class AccountsController(TransactionBase):
 									and item.get("use_serial_batch_fields")
 								)
 							):
-								if fieldname == "batch_no" and not item.batch_no and not item.is_free_item:
-									item.set("rate", ret.get("rate"))
-									item.set("price_list_rate", ret.get("price_list_rate"))
 								item.set(fieldname, value)
 
+								if fieldname == "batch_no" and item.batch_no and not item.is_free_item:
+									if ret.get("rate"):
+										item.set("rate", ret.get("rate"))
+
+									if not item.get("price_list_rate") and ret.get("price_list_rate"):
+										item.set("price_list_rate", ret.get("price_list_rate"))
+
 							elif fieldname in ["cost_center", "conversion_factor"] and not item.get(
 								fieldname
 							):

erpnext/selling/doctype/sales_order/test_sales_order.py

@@ -2097,6 +2097,45 @@ class TestSalesOrder(AccountsTestMixin, FrappeTestCase):
 		frappe.db.set_single_value("Stock Settings", "update_existing_price_list_rate", 0)
 		frappe.db.set_single_value("Stock Settings", "auto_insert_price_list_rate_if_missing", 0)
 
+	def test_delivery_note_rate_on_change_of_warehouse(self):
+		from erpnext.stock.doctype.warehouse.test_warehouse import create_warehouse
+
+		item = make_item(
+			"_Test Batch Item for Delivery Note Rate",
+			{
+				"has_batch_no": 1,
+				"create_new_batch": 1,
+				"batch_number_series": "BH-SDDTBIFRM-.#####",
+			},
+		)
+
+		frappe.db.set_single_value("Stock Settings", "auto_insert_price_list_rate_if_missing", 1)
+		so = make_sales_order(
+			item_code=item.name, rate=27648.00, price_list_rate=27648.00, qty=1, do_not_submit=True
+		)
+
+		so.items[0].rate = 90
+		so.save()
+		self.assertTrue(so.items[0].discount_amount == 27558.0)
+		so.submit()
+
+		warehouse = create_warehouse("NW Warehouse FOR Rate", company=so.company)
+
+		make_stock_entry(
+			item_code=item.name,
+			qty=2,
+			target=warehouse,
+			basic_rate=100,
+			company=so.company,
+			use_serial_batch_fields=1,
+		)
+
+		dn = make_delivery_note(so.name)
+		dn.items[0].warehouse = warehouse
+		dn.save()
+
+		self.assertEqual(dn.items[0].rate, 90)
+
 	def test_credit_limit_on_so_reopning(self):
 		# set credit limit
 		company = "_Test Company"