From 2238dee3e1707e86ae67834caba8bdb7f8e737bd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Thu, 29 Jan 2026 10:26:59 +0100
Subject: [PATCH] Use create date to calculate production work duration without
 write date

Closes #14562
---
 modules/production_work/work.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/production_work/work.py b/modules/production_work/work.py
index 6203cd2c22..5a80c52311 100644
--- a/modules/production_work/work.py
+++ b/modules/production_work/work.py
@@ -406,7 +406,7 @@ class WorkCycle(Workflow, ModelSQL, ModelView):
 
     def set_duration(self, now):
         if self.duration is None:
-            self.duration = now - self.write_date
+            self.duration = now - (self.write_date or self.create_date)
 
     def set_cost(self):
         if self.cost is None: