fix: validation for internal transfer entry

(cherry picked from commit 19911b48fd)

# Conflicts:
#	erpnext/accounts/doctype/sales_invoice/sales_invoice.js

erpnext/controllers/accounts_controller.py

@@ -5,7 +5,7 @@
 import json
 
 import frappe
-from frappe import _, throw
+from frappe import _, bold, throw
 from frappe.model.workflow import get_workflow_name, is_transition_condition_satisfied
 from frappe.query_builder.functions import Sum
 from frappe.utils import (
@@ -388,6 +388,15 @@ class AccountsController(TransactionBase):
 				msg += _("Please create purchase from internal sale or delivery document itself")
 				frappe.throw(msg, title=_("Internal Sales Reference Missing"))
 
+			label = "Delivery Note Item" if self.doctype == "Purchase Receipt" else "Sales Invoice Item"
+
+			field = frappe.scrub(label)
+
+			for row in self.get("items"):
+				if not row.get(field):
+					msg = f"At Row {row.idx}: The field {bold(label)} is mandatory for internal transfer"
+					frappe.throw(_(msg), title=_("Internal Transfer Reference Missing"))
+
 	def disable_pricing_rule_on_internal_transfer(self):
 		if not self.get("ignore_pricing_rule") and self.is_internal_transfer():
 			self.ignore_pricing_rule = 1