sub.ts

        const res = await stripe.subscriptions.update(subscriptions[0].id, {
          default_payment_method: paymentMethods[0].id,
          billing_cycle_anchor: 'unchanged',
          proration_behavior:'always_invoice',
          items: [
            ...subscriptions[0].items.data.map((item) => ({
              id: item.id,
              deleted: true,
              clear_usage:
                item.plan.usage_type === 'metered' ? true : undefined,
            })),
            {
              price: opts.input.priceId,
            },
          ],
        });