Maintenance
Event Series
To delete CollectionEventSeries with no relation to CollectionEvents or
other event series choose the tab page Orphaned data -
Series. Click the List
orphaned event series button to list these series. The detected data
will be listed as shown below. In case there are orphaned images these
must be deleted first (see below). Click on the
Delete orphaned event images
and and
the Delete orphaned event series
button to delete the data.