fix: Serial Nos popup only appears 1 time

erpnext/public/js/controllers/transaction.js

@@ -589,6 +589,8 @@ erpnext.TransactionController = class TransactionController extends erpnext.taxe
 
 	item_code(doc, cdt, cdn) {
 		var me = this;
+		frappe.flags.dialog_set = false;
+
 		// Experimental: This will be removed once stability is achieved.
 		if (frappe.boot.sysdefaults.use_server_side_reactivity) {
 			var item = frappe.get_doc(cdt, cdn);