From 01727ac772002daf908946d15fd41a2f44c43c19 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 5 Jun 2023 12:55:00 +0200
Subject: [PATCH] Fill result for unknown parent in sum_tree

The parent of a record may not be in the list of instances computed.
---
 trytond/trytond/model/tree.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/trytond/trytond/model/tree.py b/trytond/trytond/model/tree.py
index fc6d711d09..969a338190 100644
--- a/trytond/trytond/model/tree.py
+++ b/trytond/trytond/model/tree.py
@@ -160,7 +160,10 @@ def sum_tree(records, values, parent='parent'):
             records.remove(leaf)
             parent = parents.get(leaf)
             if parent:
-                result[parent] += result[leaf]
+                try:
+                    result[parent] += result[leaf]
+                except KeyError:
+                    result[parent] = result[leaf]
         next_leafs = set(records)
         for record in records:
             parent = parents.get(record)