Merge pull request #45731 from frappe/mergify/bp/version-15-hotfix/pr-45447

fix(pos): add item in the existing item row when discount is applied (backport #45447)

erpnext/selling/page/point_of_sale/pos_controller.js

@@ -682,7 +682,7 @@ erpnext.PointOfSale.Controller = class {
 					i.item_code === item_code &&
 					(!has_batch_no || (has_batch_no && i.batch_no === batch_no)) &&
 					i.uom === uom &&
-					i.rate === flt(rate)
+					i.price_list_rate === flt(rate)
 			);
 		}