I\'m using Heroku\'s Postgres addon, and I created a new production database from the Heroku Postgres addon page. I Didn\'t add it directly to my App using the Resources page of
Heroku add-ons may now be attached across applications and multiple times on a single app.
heroku addons:attach ADDON_NAME -a APP_NAME
Source: https://devcenter.heroku.com/changelog-items/646
To know the name of your addon, do:
heroku addons
Source: https://devcenter.heroku.com/articles/managing-add-ons