Cannot add a price requiring a payment method to a cardless trial subscription

{
  "error": {
    "type": "request_error",
    "code": "subscription_price_requires_payment_method_on_cardless_trial",
    "detail": "Prices that require a payment method can't be added to a cardless trial subscription before a payment method is added.",
    "documentation_url": "https://developer.paddle.com/errors/subscriptions/subscription_price_requires_payment_method_on_cardless_trial"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}

Details

Status code

400

Error code

subscription_price_requires_payment_method_on_cardless_trial

Error message

Prices that require a payment method can't be added to a cardless trial subscription before a payment method is added.

Common causes

• You're trying to update a subscription to include an item that requires a payment method, but the subscription is a cardless trial without a payment method.

Troubleshooting

• Add a payment method to the subscription, then retry the request.
• Modify your request to remove any items that require a payment method.
• Update prices so that trial_period.requires_payment_method is false.