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Error with rollback
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When I revert an edit, it doesn't appear the classic diff, showing the changes made, but it shows an error message. This happens on Wikidata, MediaWiki and Meta-Wiki. See

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Aklapper raised the priority of this task from Medium to Needs Triage.Mar 25 2015, 12:11 PM

Hi @Matiia, thanks for taking the time to report this!

What are the exact steps, single click by single click, to reproduce this problem, so someone else could manage to see exactly the same problem? What is the URL / link of the screenshot?

It looks like you managed to revert in the end in but I wonder which two revisions your screenshot refers to (as it says "No se han encontrado 2 revisiones de la comparación solicitada")?

The message is 'difference-missing-revision', no idea why the rollback does not found the previous inserted revision for the diff.