Errors when editing characteristics / Variants

Notice: Undefined offset: 0 in W:\htdocs\Jonathan\Joomla\administrator\components\com_hikashop\classes\product.php on line 83

Notice: Undefined property: stdClass::$values in W:\htdocs\Jonathan\Joomla\administrator\components\com_hikashop\views\product\tmpl\infovariant.php on line 33

I deleted a characteristic - the dependent variants still exist.
Had to manually delete variant records from database.

Hi,

Deleting a characteristic used in products is now something common
We will change a bit the code to avoid displaying errors. However, we don't want to delete the variants of the products using that characteristic. It is preferable to let the user delete himself the variants he wants to delete, etc as they are linked to files, images, orders, etc.
Deleting automatically everything which is remotely linked to a characteristic doesn't sound like a good idea