Error
Request ID: W6GNfArAADkAABE6cZcAAABI
Session "{session}": User ID mismatch, {uid_a} !== {uid_b}
Session "[50]CentralAuthSessionProvider<+:#:#####>########": User ID mismatch, ## !== ##
[object] (MediaWiki\Session\SessionInfo: [50]CentralAuthSessionProvider<+:##:####>#####)
Notes
This warning was recorded 1,912 times in the last 7 days (Logstash).
It originates with different domain names (most frequently from en.wikipedia.org, login.wikimedia.org, and de.wikipedia.org).
The urls it is triggered from tend to be page views, or action=raw requests.
See also: