diff --git a/setup/modelfactory.class.inc.php b/setup/modelfactory.class.inc.php
index 771d6f2f7..0a54fd176 100644
--- a/setup/modelfactory.class.inc.php
+++ b/setup/modelfactory.class.inc.php
@@ -2211,7 +2211,7 @@ class MFElement extends Combodo\iTop\DesignElement
 				$sExceptionMessage = <<<EOF
 could not be added : already exists in `{$sExistingPath}` at line {$iExistingLine}
 EOF;
-				ModelFactoryEx::ThrowMFException($sExceptionMessage, MFException::COULD_NOT_BE_ADDED, $oNode);
+				ModelFactory::ThrowMFException($sExceptionMessage, MFException::COULD_NOT_BE_ADDED, $oNode);
 			}
 			$oExisting->ReplaceWithSingleNode($oNode);
 			$sFlag = 'replaced';
@@ -2249,13 +2249,13 @@ EOF;
 		if (!$oExisting)
 		{
 			$sPath = MFDocument::GetItopNodePath($this)."/".$oNode->tagName.(empty($sSearchId) ? '' : "[$sSearchId]");
-			ModelFactoryEx::ThrowMFException('could not be modified (not found)', MFException::COULD_NOT_BE_MODIFIED_NOT_FOUND, $oNode, '', $sPath, $oParentFallbackNode);
+			ModelFactory::ThrowMFException('could not be modified (not found)', MFException::COULD_NOT_BE_MODIFIED_NOT_FOUND, $oNode, '', $sPath, $oParentFallbackNode);
 		}
 		$sPrevFlag = $oExisting->GetAlteration();
 		$sOldId = $oExisting->getAttribute('_old_id');
 		if ($oExisting->IsRemoved()) {
 			$sPath = MFDocument::GetItopNodePath($this)."/".$oNode->tagName.(empty($sSearchId) ? '' : "[$sSearchId]");
-			ModelFactoryEx::ThrowMFException('could not be modified (marked as deleted)', MFException::COULD_NOT_BE_MODIFIED_ALREADY_DELETED, $oNode, '', $sPath, $oParentFallbackNode);
+			ModelFactory::ThrowMFException('could not be modified (marked as deleted)', MFException::COULD_NOT_BE_MODIFIED_ALREADY_DELETED, $oNode, '', $sPath, $oParentFallbackNode);
 		}
 		$oExisting->ReplaceWithSingleNode($oNode);
 		if (!$this->IsInDefinition()) {