Effects on Summarization Levels and Data 

It must be possible to ensure that, when you jump between reports using the report/report interface, or when you switch planning screens, the system always displays consistent values regardless of whether the data is selected from the segment table or from a presummarized form.

Consequently, when you perform realignments, this entails the invalidation of all summarization levels and summarization data. This means that you must recreate the summarization levels and data. Only then will access be available again.