We've discovered an issue in 2.3.2 that, in rare cases, allowed users to create accounts with the same username as existing accounts. If you have already upgraded to v2.3.2, it is recommended to upgrade to v2.3.3 as soon as possible.
v2.3.3 is a small patch and requires no extra steps, only getting the new code and restarting Mastodon.
A new rake task is included to troubleshoot/clean-up.
