Export some XWiki page as a XAR document, then import document from XAR page again. Note that document creation and last update dates are mismatched for imported document, e.g.
Last modified by superadmin on 2011-06-06 17:12
Created by superadmin on 2014-07-21 11:43
which actually should be:
Last modified by superadmin on 2014-07-21 11:43
Created by superadmin on 2011-06-06 17:12