Same as T106850, but with private info redacted:
Query: INSERT INTO `globaluser` (gu_name,gu_email,gu_email_authenticated,gu_salt,gu_password,gu_locked,gu_hidden,gu_registration) VALUES ('{username}','{email}',NULL,'','REDACTED','0','','...') Function: CentralAuthUser::register Error: 1062 Duplicate entry '...' for key 'gu_name' (10.64.16.22)
Seeing some duplicate key issues from multiple extensions (see T106849 for example). Not sure if they're all caused by the same underlying issue.