fix: download materials request plan in PP

(cherry picked from commit f4acdd9636)

erpnext/manufacturing/doctype/production_plan/production_plan.js

@@ -400,13 +400,17 @@ frappe.ui.form.on("Production Plan", {
 	},
 
 	download_materials_required(frm) {
+		const warehouses_data = [{
+			warehouse: frm.doc.for_warehouse
+		}];
 		const fields = [
 			{
 				fieldname: "warehouses",
 				fieldtype: "Table MultiSelect",
 				label: __("Warehouses"),
-				default: frm.doc.from_warehouse,
+				default: warehouses_data,
 				options: "Production Plan Material Request Warehouse",
+				reqd: 1,
 				get_query: function () {
 					return {
 						filters: {