In some cases of improper use of the delete () function, the complete...

In some cases of improper use of the delete () function, the complete repertoire of propale objects, invoice or order was deleted.

Ex in agefodd module:
	$obj_link=new Propal($db);
        $obj_link->id=$agf->propalid;
        $resultdel=$obj_link->delete($user);

To prevent misuse of the function, the reference is not considered given