diff --git a/htdocs/core/actions_massactions.inc.php b/htdocs/core/actions_massactions.inc.php
index 79d70727331..4f738f68a97 100644
--- a/htdocs/core/actions_massactions.inc.php
+++ b/htdocs/core/actions_massactions.inc.php
@@ -642,7 +642,9 @@ if ($massaction == 'confirm_createbills') {   // Create bills from orders.
 	$lastref = '';
 
 	$db->begin();
-
+	
+	$nbOrders = is_array($orders) ? count($orders) : 1;
+	
 	foreach ($orders as $id_order) {
 		$cmd = new Commande($db);
 		if ($cmd->fetch($id_order) <= 0) {
@@ -774,7 +776,7 @@ if ($massaction == 'confirm_createbills') {   // Create bills from orders.
 						}
 
 						$objecttmp->context['createfromclone'];
-
+						$rankedLine = ($nbOrders > 1) ? -1 : $lines[$i]->rang;
 						$result = $objecttmp->addline(
 							$desc,
 							$lines[$i]->subprice,
@@ -792,7 +794,9 @@ if ($massaction == 'confirm_createbills') {   // Create bills from orders.
 							'HT',
 							0,
 							$product_type,
-							$lines[$i]->rang,
+							//we have define the max rank for each line which makes it possible not to have a duplicate on the rank field in the case of several orders
+							//-1 will give us the right number
+							$rankedLine, // rank
 							$lines[$i]->special_code,
 							$objecttmp->origin,
 							$lines[$i]->rowid,