diff --git a/ChangeLog b/ChangeLog
index f363b3fa459..1f47f112ab2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,7 @@ For users:
 - Fix: Can use $ in database and login/pass values.
 - Fix: No error on upgrade if there is orphelins tasks.
 - Fix: Failed to login when user agent string was longer than 128.
+- Fix: bug #29526 : Numérotation Proposition Incorrecte après duplication
 
 
 ***** ChangeLog for 2.8 compared to 2.7 *****
diff --git a/htdocs/propal.class.php b/htdocs/propal.class.php
index 1ce7850ae97..de0c9bb3b3a 100644
--- a/htdocs/propal.class.php
+++ b/htdocs/propal.class.php
@@ -89,7 +89,7 @@ class Propal extends CommonObject
 	var $adresse;
 
 	var $products=array();
-	
+
 	var $lines = array();
 
 	var $labelstatut=array();
@@ -729,6 +729,10 @@ class Propal extends CommonObject
 		$object->id=0;
 		$object->statut=0;
 
+		require_once(DOL_DOCUMENT_ROOT ."/societe.class.php");
+		$objsoc=new Societe($this->db);
+		$objsoc->fetch($object->socid);
+
 		if (empty($conf->global->PROPALE_ADDON) || ! is_readable(DOL_DOCUMENT_ROOT ."/includes/modules/propale/".$conf->global->PROPALE_ADDON.".php"))
 		{
 			$this->error='ErrorSetupNotComplete';
@@ -738,7 +742,7 @@ class Propal extends CommonObject
 		require_once(DOL_DOCUMENT_ROOT ."/includes/modules/propale/".$conf->global->PROPALE_ADDON.".php");
 		$obj = $conf->global->PROPALE_ADDON;
 		$modPropale = new $obj;
-		$numpr = $modPropale->getNextValue($soc,$object);
+		$numpr = $modPropale->getNextValue($objsoc,$object);
 
 		// Clear fields
 		$object->ref                = $numpr;