FIX: Do not convert negative line to discount if variable is active

htdocs/commande/list.php

@@ -9,7 +9,7 @@
  * Copyright (C) 2015-2018  Frédéric France         <frederic.france@netlogic.fr>
  * Copyright (C) 2015       Marcos García           <marcosgdf@gmail.com>
  * Copyright (C) 2015       Jean-François Ferry     <jfefe@aternatik.fr>
- * Copyright (C) 2016-2021  Ferran Marcet           <fmarcet@2byte.es>
+ * Copyright (C) 2016-2023  Ferran Marcet           <fmarcet@2byte.es>
  * Copyright (C) 2018       Charlene Benke	        <charlie@patas-monkey.com>
  * Copyright (C) 2021	   	Anthony Berton			<anthony.berton@bb2a.fr>
  *
@@ -403,7 +403,7 @@ if (empty($reshook)) {
 							$desc = dol_concatdesc($desc, $langs->trans("Order").' '.$cmd->ref.' - '.dol_print_date($cmd->date, 'day'));
 						}
 
-						if ($lines[$i]->subprice < 0) {
+						if ($lines[$i]->subprice < 0 && empty($conf->global->INVOICE_KEEP_DISCOUNT_LINES_AS_IN_ORIGIN)) {
 							// Negative line, we create a discount line
 							$discount = new DiscountAbsolute($db);
 							$discount->fk_soc = $objecttmp->socid;