Please see bug 20446
Please create a maintenance script to convert all user rights log entries at Meta-Wiki in the type User:A@metawiki to User:A.
Example: https://meta.wikimedia.org/w/index.php?title=Special%3ALog&type=rights&user=&page=User%3AMike.lifeguard%40metawiki&year=&month=-1&tagfilter=; although there are a lot more from other stewards before the bug I cite above was fixed.
This, as it is, splits the user rights log of a single user in two, which is annoying.
Best regards.
Version: wmf-deployment
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=20446