Haw programmatically replace the license?

[Pavel EgorovParticipant]

Hi! I want to programmatically replace the license for the purpose of additional image processing while saving the order.
I do through Hook:
add_action(‘woocommerce_checkout_order_processed’, ‘epe_change_lic_for_wc_order’, 10, 1 );
Actually, I am trying to change the license to the desired one –
update_post_meta($p, ‘attribute_pa_license’, ‘smallimage’);
After that I keep an order:
$order->save_meta_data();
$order->save();

However, the license does not change.
Tell me, please, how to properly replace the license programmatically?

[Author]

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