def METHOD_NAME(domain, other_domain):
    plan_version = Subscription.get_active_subscription_by_domain(domain).plan_version
    plan = plan_version.plan
    plan.is_customer_software_plan = True
    plan.save()
    other_subscription = Subscription.get_active_subscription_by_domain(other_domain)
    other_subscription.plan_version = plan_version
    other_subscription.save()