Why does the filter break when deleting a category in the store?

Question

WordPress

Worth yith-woocommerce-ajax-product-filter Everything works fine
Code I remove the category

add_action( 'pre_get_posts', 'custom_pre_get_posts_query' );
function custom_pre_get_posts_query( $q )
{

if (!$q->is_main_query() || !is_shop()) return;
if ( ! is_admin() )
{
$q->set( 'tax_query', array(array(
'taxonomy' => 'product_cat',
'field' => 'id',
'terms' => array( 192 ),
'operator' => 'NOT IN'
)));
}
}

The filter stops filtering, you click on the property, it thinks it thinks and throws out the entire directory.
I put another filter plugin dvanced AJAX Product Filters for WooCommerce Everything filters fine ..
Just wondering, why is this?