From 7146c0385cdf13322c80ff8daf112dfc4856d295 Mon Sep 17 00:00:00 2001
From: SowmyaArunachalam <sowmyaarunachalam57@gmail.com>
Date: Tue, 27 Jan 2026 15:37:14 +0530
Subject: [PATCH] fix: handle parent level project change

(cherry picked from commit 543b6e51c08f281bd733cd0d0ceb44a480f9cf35)
---
 erpnext/public/js/utils/sales_common.js | 34 ++++++++++++++++---------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/erpnext/public/js/utils/sales_common.js b/erpnext/public/js/utils/sales_common.js
index 1adbe402744..c9b5ed7e6f2 100644
--- a/erpnext/public/js/utils/sales_common.js
+++ b/erpnext/public/js/utils/sales_common.js
@@ -489,18 +489,28 @@ erpnext.sales_common = {
 			}
 
 			project(doc, cdt, cdn) {
-				const item = frappe.get_doc(cdt, cdn);
-				if (item.project) {
-					$.each(this.frm.doc["items"] || [], function (i, other_item) {
-						if (!other_item.project) {
-							frappe.model.set_value(
-								other_item.doctype,
-								other_item.name,
-								"project",
-								item.project
-							);
-						}
-					});
+				if (!cdt || !cdn) {
+					if (this.frm.doc.project) {
+						$.each(this.frm.doc["items"] || [], function (i, item) {
+							if (!item.project) {
+								frappe.model.set_value(item.doctype, item.name, "project", doc.project);
+							}
+						});
+					}
+				} else {
+					const item = frappe.get_doc(cdt, cdn);
+					if (item.project) {
+						$.each(this.frm.doc["items"] || [], function (i, other_item) {
+							if (!other_item.project) {
+								frappe.model.set_value(
+									other_item.doctype,
+									other_item.name,
+									"project",
+									item.project
+								);
+							}
+						});
+					}
 				}
 				let me = this;
 				if (["Delivery Note", "Sales Invoice", "Sales Order"].includes(this.frm.doc.doctype)) {