diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 81e3584b773..44297da0ff3 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -1954,7 +1954,7 @@ 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';
@@ -1986,6 +1986,13 @@ 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)
 			{
diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 34c9f8de335..8e12bf11b45 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -1025,7 +1025,7 @@ 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';
@@ -1058,6 +1058,13 @@ 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)
     		{