How do I get the LeadId Contact Hook after converting lead to Contact?

[dmyaccnt101]

I created a hook on contact with method before/afterSave and I want to get the leadId after I converting the Lead to Contact but when I try to get it using $entity->get('originalLeadId')
it seems empty

PHP Code:
namespace Espo\Modules\Extension\Hooks\Contact;

use Espo\ORM\Entity;

class LeadToContactHook

public function afterSave(Entity $entity, array $options) :void
{
error_log($entity->get('originalLeadId'));
}