fix: description overwrite on qty change (backport #44606) (#44609)

fix: description overwrite on qty change (#44606)

(cherry picked from commit 9ad7962)

Co-authored-by: rohitwaghchaure <rohitw1991@gmail.com>

erpnext/stock/doctype/material_request/material_request.js

@@ -259,18 +259,21 @@ frappe.ui.form.on("Material Request", {
 			},
 			callback: function (r) {
 				const d = item;
-				const allow_to_change_fields = [
+				let allow_to_change_fields = [
 					"actual_qty",
 					"projected_qty",
 					"min_order_qty",
 					"item_name",
-					"description",
 					"stock_uom",
 					"uom",
 					"conversion_factor",
 					"stock_qty",
 				];
 
+				if (overwrite_warehouse) {
+					allow_to_change_fields.push("description");
+				}
+
 				if (!r.exc) {
 					$.each(r.message, function (key, value) {
 						if (!d[key] || allow_to_change_fields.includes(key)) {