mozilla/kuma — pull request #148 by groovecoder (2012-03-29 22:28:10+00:00)
Title: Fix Bug 740065 remove duplicate constance config keys and add unique con...

I had to

INSERT INTO constance_config (`key`, `value`) values ('DEMOS_DEVDERBY_CHALLENGE_CHOICE_TAGS', 'some other value');

to replicate the kuma-stage behavior. Then I ran this schematic migration and it fixed the issue.

I also submitted a [pull request](https://github.com/jezdez/django-constance/pull/1) to jezdez to fix the underlying issue in django-constance