diff --git a/erpnext/public/js/utils.js b/erpnext/public/js/utils.js
index 64b96b5..dd8abfb 100755
--- a/erpnext/public/js/utils.js
+++ b/erpnext/public/js/utils.js
@@ -595,6 +595,7 @@
 }
 
 erpnext.utils.clear_duplicates = function() {
+	if(!cur_frm.doc.items) return;
 	const unique_items = new Map();
 	/*
 		Create a Map of items with