[Plugin: Advanced Custom Fields] Warning Error with custom Taxonomy

When you try to add terms directly in the edit screen of your custom post type and updates, it throws an error :

Undefined index: taxonomy in …/advanced-custom-fields/core/controllers/everything_fields.php on line 293

I replaced the line with this and it works normally now :

$option_name = (isset($_POST['taxonomy'])) ? $_POST['taxonomy'] . '_' . $term_id : '';

https://www.ads-software.com/extend/plugins/advanced-custom-fields/