Only items can be updated when subscription paused

{
  "error": {
    "type": "request_error",
    "code": "subscription_only_update_items_on_paused_subscription",
    "detail": "only items can be updated when a subscription is paused",
    "documentation_url": "https://developer.paddle.com/errors/subscriptions/subscription_only_update_items_on_paused_subscription"
  },
  "meta": {
    "request_id": "00000000-0000-0000-0000-000000000000"
  }
}