From d9a408b959b7d72d490a52706ad4af5293bb0eec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Thu, 19 Mar 2020 00:39:29 +0100
Subject: [PATCH] Do no clear coupons if it is already empty

issue9095
review289421003
---
 sale.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sale.py b/sale.py
index 6a2ef48fd5..538bdf1035 100644
--- a/sale.py
+++ b/sale.py
@@ -186,7 +186,8 @@ class Sale(metaclass=PoolMeta):
     @Workflow.transition('cancel')
     def cancel(cls, sales):
         for sale in sales:
-            sale.coupons = []
+            if sale.coupons:
+                sale.coupons = []
         cls.save(sales)
         super(Sale, cls).cancel(sales)