Change Rejected

Summary

I am trying to update the description of a newly created issue, but getting a "Error updating issue" message.

Steps to reproduce

1. Create a new issue (I got a captcha when saving)
2. Edit the description
3. Save the changes

Example Project

https://gitlab.com/gitlab-org/gitlab-ce/issues/37578

What is the current bug behavior?

The server responds to the edit request with a code 422 (Unprocessable Entity) and an HTML payload that contains the message "The change you requested was rejected."

What is the expected correct behavior?

The server should respond with a code 200 and apply the requested edit.

Relevant logs and/or screenshots

<div class="container">
  <h3>The change you requested was rejected.</h3>
  <hr />
  <p>Make sure you have access to the thing you tried to change.</p>
  <p>Please contact your GitLab administrator if you think this is a mistake.</p>
  <a href="javascript:history.back()" class="js-go-back go-back">Go back</a>
</div>

Output of checks

This bug happens on GitLab.com

Possible fixes

Investigate why edits by the authenticated author of an issue were rejected?