User name Email address mismatch between old and new in Django

[amyburness]

The first column in the downloaded CSV from observations is called 'User name', but I think this has been updated to be the email address of a person who registers. However, people who registered before the update still have their old username in this field. Please can this also be resolved so that only email addresses appear, the name of the column is user email, and the legacy usernames are removed.

[amyburness]

I need to check if this is even possible we can't fix old data.