Be able to edit history on more fields

We should be able to edit the history on more fields. In salary, we can delete and edit changes. But on the other fields: reports to, department, job title, work pattern etc, you can add changes but you can't delete or edit changes which can lead to multiple changes on the same effective date and things that were done in error (or as a test) having to remain in the system. All the fields should work in the same way as salary with more ability to make changes.