From 9e69b12847af42ad2a829e9450939145cb04ada1 Mon Sep 17 00:00:00 2001
From: Laurent Destailleur <eldy@destailleur.fr>
Date: Sat, 2 Nov 2019 13:37:30 +0100
Subject: [PATCH] FIX #12281

---
 htdocs/product/class/product.class.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 45990a4f2a5..9c4cebb74aa 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -2087,7 +2087,10 @@ class Product extends CommonObject
         }
 
         $resql = $this->db->query($sql);
-        if ($resql ) {
+        if ($resql) {
+
+        	unset($this->oldcopy);
+
             if ($this->db->num_rows($resql) > 0) {
                 $obj = $this->db->fetch_object($resql);