From a3cacf4d21da9cb50feee319764d7364a3428a33 Mon Sep 17 00:00:00 2001
From: Andreas Osim <andreas.osim@glaser-co.at>
Date: Tue, 1 Dec 2020 15:13:30 +0100
Subject: [PATCH] fix last_order_date when empty sale.order

---
 ext/custom-addons/dp_custom/models/sale.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ext/custom-addons/dp_custom/models/sale.py b/ext/custom-addons/dp_custom/models/sale.py
index 7bd3bf93..58e5ffc6 100644
--- a/ext/custom-addons/dp_custom/models/sale.py
+++ b/ext/custom-addons/dp_custom/models/sale.py
@@ -553,7 +553,8 @@ class SaleOrder(models.Model):
         if vals.get('order_line',False):
             self._reset_sequence()
 
-        self.partner_id.last_order_changed = datetime.now()
+        if self.partner_id:
+            self.partner_id.last_order_changed = datetime.now()
 
         return res