Save a pod with a yes/no field

I have created a CPT which has a Yes/No field. I am building a custom page where users can change this Yes/No field in bulk. I am trying to pass values to this field but nothing sticks. I have tried values 0 and 1 as integers and strings, also the strings “Yes” and “No”.

I am saving the posts like this:

$pod = pods( 'pod_cpt', $post_id );

$data = array(
    'item_sold' => $boolean,
    'row' => $row,
);
$pod->save( $data );

The rowfield is being saved since it’s a text field, however the item_soldfield is not.

Any ideas?