fix: POS Opening Entry with empty balance detail rows

erpnext/accounts/doctype/pos_opening_entry/pos_opening_entry.py

@@ -24,6 +24,7 @@ class POSOpeningEntry(StatusUpdater):
 	def validate_payment_method_account(self):
 		invalid_modes = []
 		for d in self.balance_details:
+			if d.mode_of_payment:
 				account = frappe.db.get_value("Mode of Payment Account",
 					{"parent": d.mode_of_payment, "company": self.company}, "default_account")
 				if not account:

erpnext/selling/page/point_of_sale/pos_controller.js

@@ -106,6 +106,10 @@ erpnext.PointOfSale.Controller = class {
 					})
 					return frappe.utils.play_sound("error");
 				}
+
+				// filter balance details for empty rows
+				balance_details = balance_details.filter(d => d.mode_of_payment);
+
 				const method = "erpnext.selling.page.point_of_sale.point_of_sale.create_opening_voucher";
 				const res = await frappe.call({ method, args: { pos_profile, company, balance_details }, freeze:true });
 				!res.exc && this.prepare_app_defaults(res.message);