There are 2 UUIDs which have the same username: "Leave".
This is not related to WEB-8 (or WEB-11) as they are not demo accounts and they are not legacy accounts too.
We can see on the sessionserver API that these are not legacy accounts:
Status:Fixed
Reporter:Picsou993
Created:2020-08-16, 01:33 AM
Updated:2021-10-07, 03:48 PM
Resolved:2021-10-07, 03:48 PM
Votes:0
Watchers:1
Labels:name-error