Registered usernames can no longer be used by an anonymous author

Until now a registered user has been able to make a change without authenticating, by entering their username in the author field. Any user could make a comment using a registered username. While this hasn't been a significant problem up until now, it was possible that a user could make changes with malicious intent, disguising themselves as a registered user. The issue was discussed in #11622 and changes have been deployed to

Please note that you are still free to make a comment or create a ticket using a username or email that has not been registered at If you have any questions or concerns please leave a comment below.


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