Hello all,

During the data centre switchover routine on October 10th, some unexpected problems occurred over the past days:

• For a few hours, a small part of the data was not accessible. Some items and lexemes seemed to have disappeared.
• Some data may have been lost, including edits, preferences changed as well as user accounts created during a period or about 50 minutes (from 2018-09-13 09:08:17 UTC to 2018-09-13 09:58:26).

Part of the data has already been restored (edits and revisions. The rest (user accounts, preferences) will be restored at the beginning of next week.

If you edited Wikidata on September 13th, please check your contributions. If you encounter any problem in the next days, like items not reappearing or something missing, let me know.

If you're interested in technical details, you can have a look at the Phabricator ticket. Thanks for your understanding,