你好，
我正在尝试使用Heroku部署doccano。我遇到了以下错误：
We tried to create heroku-postgresql:mini, but received an error from the add-on provider. Try the request again, or log a support ticket and include this message: The mini plan has reached end-of-life. You can try again with a valid plan. See the available plans with: heroku addons:plans heroku-postgresql.
请问如何解决这个问题？谢谢。