これが何が起こったのかです...
pgbackups:capture は以下を与えました:
! must delete a backup before creating a new one
...だから私は過去のバックアップを削除しようとしました:
$ heroku pgbackups
ID Backup Time Size Database
---- ------------------- ----- ---------------
b003 2012/07/16 11:27.19 2.4MB SHARED_DATABASE
b004 2012/08/09 05:27.57 2.5MB SHARED_DATABASE
$ heroku pgbackups:destroy b003
! Internal server error.
! Run `heroku status` to check for known platform issues.
$ heroku status
=== Heroku Status
Development: No known issues at this time.
Production: No known issues at this time.
何か案は?