We upgraded content databases from SharePoint 2007 Enterprise to SharePoint 2010 Enterprise. A few of our users were using a Report Library (not related to SSRS).
During the upgrade, it stripped out the "History" column. We went through the audit log (using Axceler ControlPoint) and it showed the user who performed the upgrade deleted the "Reporting Metadata/2_.000", for example. The delete was done by
the actual upgrade process, though, not the user.
It seems that this was a global action carried across all sites in the farm during the upgrade.
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