From bd63231355bf9a035110956f76faa374e3335a7c Mon Sep 17 00:00:00 2001
From: Albert Cervera i Areny <albert@nan-tic.com>
Date: Fri, 4 Dec 2020 12:58:10 +0100
Subject: [PATCH] Add issue8944.diff.

---
 issue8944.diff | 17 +++++++++++++++++
 series         |  2 ++
 2 files changed, 19 insertions(+)
 create mode 100644 issue8944.diff

diff --git a/issue8944.diff b/issue8944.diff
new file mode 100644
index 0000000..e575348
--- /dev/null
+++ b/issue8944.diff
@@ -0,0 +1,17 @@
+--- a/trytond/trytond/modules/sale_shipment_cost/sale.py
++++ b/trytond/trytond/modules/sale_shipment_cost/sale.py
+@@ -168,13 +168,12 @@
+     def quote(cls, sales):
+         pool = Pool()
+         Line = pool.get('sale.line')
+-
+-        super(Sale, cls).quote(sales)
+         removed = []
+         for sale in sales:
+             removed.extend(sale.set_shipment_cost())
+         Line.delete(removed)
+         cls.save(sales)
++        super(Sale, cls).quote(sales)
+ 
+     @classmethod
+     @ModelView.button
diff --git a/series b/series
index 28933cb..ef4ce82 100644
--- a/series
+++ b/series
@@ -59,3 +59,5 @@ issue9519.diff # [sale + purchase] Use search context for product field on line
 issue9814.diff #[product] Product template search bar showing non serchable product.product function fields as recomendation
 
 rule_account_journal_period.diff # [account] Add missing rule for account.journal.period
+
+issue8944.diff # [sale_shipment_cost] Prevent crash when duplicating a sale and moving it to quote state.