From 64e2ed34f0453c5be2864b68d37f3cd370fe0326 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adri=C3=A0=20Tarroja=20Caubet?= <atarroja@kopen.es>
Date: Mon, 20 Jun 2022 23:43:27 +0200
Subject: [PATCH] Filter out empty mandates before lock

issue11537
review419251003
---
 payment.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/payment.py b/payment.py
index 10a0fa8cbc..c152adc4e3 100644
--- a/payment.py
+++ b/payment.py
@@ -211,7 +211,7 @@ class Group(metaclass=PoolMeta):
         if self.kind == 'receivable':
             payments = list(self.payments)
             mandates = Payment.get_sepa_mandates(payments)
-            Mandate.lock(mandates)
+            Mandate.lock(filter(None, mandates))
             sequence_types = {}
             for payment, mandate in zip(payments, mandates):
                 if not mandate: