title: postgres database : Insufficient privilege, permission denied for relation table
body: <p>I have been using the postgres database on heroku for a while. and suddenly I had some problems on saving to database 
  I got this error all the time</p>
  
  <pre><code> Insufficient privilege, permission denied for relation table 
  </code></pre>
  
  <p>its a problem of user permission , but I'm confused why it happened , because it was working correctly before</p>