diff --git a/htdocs/bom/bom_card.php b/htdocs/bom/bom_card.php
index 2eff03dce82..5466fb54f8f 100644
--- a/htdocs/bom/bom_card.php
+++ b/htdocs/bom/bom_card.php
@@ -197,7 +197,7 @@ if (empty($reshook)) {
 		}
 	}
 
-	// Add line
+	// Update line
 	if ($action == 'updateline' && $user->rights->bom->write) {
 		$langs->load('errors');
 		$error = 0;
@@ -213,26 +213,24 @@ if (empty($reshook)) {
 			$error++;
 		}
 
-		$bomline = new BOMLine($db);
-		$bomline->fetch($lineid);
-		$bomline->qty = $qty;
-		$bomline->qty_frozen = (int) $qty_frozen;
-		$bomline->disable_stock_change = (int) $disable_stock_change;
-		$bomline->efficiency = $efficiency;
+		if (!$error) {
 
-		$result = $bomline->update($user);
-		if ($result <= 0) {
-			setEventMessages($bomline->error, $bomline->errors, 'errors');
-			$action = '';
-		} else {
-			unset($_POST['idprod']);
-			unset($_POST['qty']);
-			unset($_POST['qty_frozen']);
-			unset($_POST['disable_stock_change']);
+			$bomline = new BOMLine($db);
+			$bomline->fetch($lineid);
 
-			$object->fetchLines();
+			$result = $object->updateLine($lineid, $qty, (int)$qty_frozen, (int)$disable_stock_change, $efficiency, $bomline->position, $bomline->import_key);
 
-			$object->calculateCosts();
+			if ($result <= 0) {
+				setEventMessages($object->error, $object->errors, 'errors');
+				$action = '';
+			} else {
+				unset($_POST['idprod']);
+				unset($_POST['qty']);
+				unset($_POST['qty_frozen']);
+				unset($_POST['disable_stock_change']);
+
+				$object->fetchLines();
+			}
 		}
 	}
 }
diff --git a/htdocs/bom/class/api_boms.class.php b/htdocs/bom/class/api_boms.class.php
index 3c06a658b96..fb7d175a229 100644
--- a/htdocs/bom/class/api_boms.class.php
+++ b/htdocs/bom/class/api_boms.class.php
@@ -391,7 +391,6 @@ class Boms extends DolibarrApi
 			$request_data->disable_stock_change,
 			$request_data->efficiency,
 			$request_data->position,
-			$request_data->fk_bom_child,
 			$request_data->import_key
 		);
 
diff --git a/htdocs/bom/class/bom.class.php b/htdocs/bom/class/bom.class.php
index e774e4ddacf..ec659502e60 100644
--- a/htdocs/bom/class/bom.class.php
+++ b/htdocs/bom/class/bom.class.php
@@ -616,13 +616,13 @@ class BOM extends CommonObject
 	 * @param	string	$import_key				Import Key
 	 * @return	int								<0 if KO, Id of updated BOM-Line if OK
 	 */
-	public function updateLine($rowid, $qty, $qty_frozen = 0, $disable_stock_change = 0, $efficiency = 1.0, $position = -1, $fk_bom_child = null, $import_key = null)
+	public function updateLine($rowid, $qty, $qty_frozen = 0, $disable_stock_change = 0, $efficiency = 1.0, $position = -1, $import_key = null)
 	{
 
 		global $mysoc, $conf, $langs, $user;
 
 		$logtext = "::updateLine bomid=$this->id, qty=$qty, qty_frozen=$qty_frozen, disable_stock_change=$disable_stock_change, efficiency=$efficiency";
-		$logtext .= ", fk_bom_child=$fk_bom_child, import_key=$import_key";
+		$logtext .= ", import_key=$import_key";
 		dol_syslog(get_class($this).$logtext, LOG_DEBUG);
 
 		if ($this->statut == self::STATUS_DRAFT) {
@@ -641,9 +641,6 @@ class BOM extends CommonObject
 			if (empty($efficiency)) {
 				$efficiency = 1.0;
 			}
-			if (empty($fk_bom_child)) {
-				$fk_bom_child = null;
-			}
 			if (empty($import_key)) {
 				$import_key = null;
 			}
@@ -688,7 +685,6 @@ class BOM extends CommonObject
 			$this->line->qty_frozen = $qty_frozen;
 			$this->line->disable_stock_change = $disable_stock_change;
 			$this->line->efficiency = $efficiency;
-			$this->line->fk_bom_child = $fk_bom_child;
 			$this->line->import_key = $import_key;
 			$this->line->position = $rankToUse;