Unable to disable auto-dev-ops globally


I am trying to disable auto-devops across my self-hosted GitLab installation (version 11.11.3).

I’ve tried to follow the documentation to do this through the GitLab admin interface by disabling the checkbox and saving the page.

However when the page reloads (back to the first page of settings) and I navigate back to the CI settings the option is still enabled.

I don’t see any error etc. saying why this is disabled, but I assume the option just isn’t being saved?

Is there another way I can set this (through the rails console or similar), or to debug what is preventing this being stored. I’ve tried multiple browsers (Safari, Chrome, Firefox) with no difference.