[Engineering] 1.31.0-wmf.16 MediaWiki train blocker - Rollback

[Greg Grossmeier]

We just had to rollback 1.31.0-wmf.16 from group1 (eg: all
non-wikipedias), so -wmf.16 is only on group0 at this time.

The issue is a data corruption bug[0]. The relevant people are aware.

Reminder that we have a task for each train rollout to track (potential)
blockers; the one for this week is [1]. You can follow that task to
track future progress.

Additional reminder that you can use the "Wikimedia MediaWiki
versions"[2] tool on Toolforge to know which wikis have which version at
any time.

Greg

[0] https://phabricator.wikimedia.org/T184749
[1] https://phabricator.wikimedia.org/T180749
[2] https://tools.wmflabs.org/versions/

-- 
| Greg Grossmeier            GPG: B2FA 27B1 F7EB D327 6B8E |
| Release Team Manager            A18D 1138 8E47 FAC8 1C7D |
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