From 7e545e6df4f01956fa4a1e0e6bec2bcf61893edf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Mon, 11 Sep 2023 22:02:27 +0200
Subject: [PATCH] Do not set rec_name for unsaved record

Since 0db956eb2505 _changed_value is used for on_change_with calls, so it can
have to deal with unsaved Many2One value if it is the parent of a One2Many.
(grafted from 206e247e16437dc8b2f1989cc13b7e48a1d0dfc7)

--HG--
branch : 6.0
---
 trytond/trytond/model/modelview.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/trytond/trytond/model/modelview.py b/trytond/trytond/model/modelview.py
index 9ecaf752e1..948751db7e 100644
--- a/trytond/trytond/model/modelview.py
+++ b/trytond/trytond/model/modelview.py
@@ -858,7 +858,8 @@ class ModelView(Model):
                 continue
             if field._type in ('many2one', 'one2one', 'reference'):
                 if value:
-                    if isinstance(value, ModelStorage):
+                    if (isinstance(value, ModelStorage)
+                            and value.id and value.id >= 0):
                         changed['%s.' % fname] = {
                             'rec_name': value.rec_name,
                             }