The pseudonymization feature creates a parallel to the statistics table without identifiable patron data. This allows one to then use cleanup_database to delete old entries in statistics to remove that patron data. However, the statistics table also contains records of local use. That data only exists in statistics. It is not duplicated in pseudonymized_transactions, and so is lost if statistics are deleted using cleanup_database. Bug 32440 suggests teaching cleanup_database to not delete localuse entries. This bug suggests putting localuse entries into pseudonymized_transactions, even though no patron is involved. That's a bit illogical, but has the benefit of keeping all of this data together. Meanwhile, Bug 16122 suggesting keeping a local use count in the item record. That would alleviate this issue somewhat, but specific transactional data would be preferable to a running count.