From 9b6ea0ae6a73d2a88f1cfc1f100749ea603db4f8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Tue, 15 Jul 2025 17:44:06 +0200
Subject: [PATCH] Do not fail to duplicate lot with an empty lot list

---
 modules/stock_lot/stock.py | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/modules/stock_lot/stock.py b/modules/stock_lot/stock.py
index 74acbdd905..9bbfde259e 100644
--- a/modules/stock_lot/stock.py
+++ b/modules/stock_lot/stock.py
@@ -607,11 +607,12 @@ class MoveAddLotsStart(ModelView):
         methods=['on_change_with_quantity_remaining'])
     def duplicate_lot(self):
         lots = list(self.lots)
-        template, = self.lots
-        for i in range(self.duplicate_lot_number):
-            lot = copy(template)
-            lot._id = None
-            lots.append(lot)
+        if self.lots:
+            template, = self.lots
+            for i in range(self.duplicate_lot_number):
+                lot = copy(template)
+                lot._id = None
+                lots.append(lot)
         self.lots = lots
         self.quantity_remaining = self.on_change_with_quantity_remaining()