diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 4ce494c34a7..d092a25d680 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -2057,7 +2057,7 @@ class Facture extends CommonInvoice
 	public function insert_discount($idremise)
 	{
 		// phpcs:enable
-		global $langs;
+		global $conf, $langs;
 
 		include_once DOL_DOCUMENT_ROOT.'/core/lib/price.lib.php';
 		include_once DOL_DOCUMENT_ROOT.'/core/class/discount.class.php';
@@ -2087,6 +2087,13 @@ class Facture extends CommonInvoice
 			$facligne->rang = -1;
 			$facligne->info_bits = 2;
 
+			if(!empty($conf->global->MAIN_VIEW_LINE_NUMBER)) {
+				$facligne->rang = 1;
+				for ($ii = 1; $ii <= count($this->lines); $ii++) {
+					$this->updateRangOfLine($this->lines[$ii - 1]->id, $ii+1);
+				}
+			}
+
 			// Get buy/cost price of invoice that is source of discount
 			if ($remise->fk_facture_source > 0) {
 				$srcinvoice = new Facture($this->db);
diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 2aa778b3b66..bb137410b6d 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -1111,7 +1111,7 @@ class FactureFournisseur extends CommonInvoice
 	public function insert_discount($idremise)
 	{
 		// phpcs:enable
-		global $langs;
+    	global $conf, $langs;
 
 		include_once DOL_DOCUMENT_ROOT.'/core/lib/price.lib.php';
 		include_once DOL_DOCUMENT_ROOT.'/core/class/discount.class.php';
@@ -1142,6 +1142,13 @@ class FactureFournisseur extends CommonInvoice
 			$facligne->rang = -1;
 			$facligne->info_bits = 2;
 
+			if(!empty($conf->global->MAIN_VIEW_LINE_NUMBER)) {
+				$facligne->rang = 1;
+				for ($ii = 1; $ii <= count($this->lines); $ii++) {
+					$this->updateRangOfLine($this->lines[$ii - 1]->id, $ii+1);
+				}
+			}
+
 			// Get buy/cost price of invoice that is source of discount
 			if ($remise->fk_invoice_supplier_source > 0) {
 				$srcinvoice = new FactureFournisseur($this->db);