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Updating the file statistics will ensure that old file downloads statistics data will also be filterable using the filter bundle feature. The benefit of upgrading is that only files within, for example, the "ORIGINAL" bundle are shown as opposed to also showing statistics from the LICENSE bundle. More information about this feature can be found at Statistics differences between DSpace 1.7.x and 1.8.0

Applying this change will involve dumping all the old file statistics into a file and re-loading them. Therefore it is wise to create a backup of the \[DSpace\]/solr/statistics/data directory. It is best to create this backup when the Tomcat/Jetty/Resin server program isn't running.

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