diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index dd081a87870..40d220ac717 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -1192,6 +1192,7 @@ class Facture extends CommonInvoice
 			if (($object->lines[$i]->info_bits & 0x02) == 0x02)	// We do not clone line of discounts
 			{
 				unset($object->lines[$i]);
+				continue;
 			}
 
 			// Bloc to update dates of service (month by month only if previously filled and similare to start and end of month)
@@ -1217,9 +1218,8 @@ class Facture extends CommonInvoice
 					$object->lines[$i]->date_end = $newLast;
 				}
 			}
-			if ($object->lines[$i]) {
-				$object->lines[$i]->ref_ext = '';
-			}// Do not clone ref_ext
+			
+			$object->lines[$i]->ref_ext = '';	// Do not clone ref_ext
 		}
 
 		// Create clone