Seen in authevents.log in production
2021-02-17 22:34:35 [YC2Z9cQ2YOhijN5wRI08IgAAAFM] mw1269 loginwiki 1.36.0-wmf.31 authevents INFO: Autocreation attempt {"event":"autocreate","status":{"Status":"<OK, collected 1 error(s) on the way, no value set> +------+---------------------------+------------------------------------------+ | 1 | userexists | | +------+---------------------------+------------------------------------------+ "}}
Not sure if related to T269680: MediaWiki logging indexing conflict on 'session' for 'session-ip' channel