Contact Form DB: Sender’s email not captured

My Contact Form DB displays a column for [Senders-email], however, there isn’t any information in that column.

I don’t want a field for the sender’s email in my actual Contact Form, but I would like to capture the sender’s email in my database.

To add to the above, I have a [your-email] field in my form, which is captured in the your-email column in the form. Perhaps the [Senders-email] code and column are irrelevant as in my testing, as the [your-email] is actually the sender anyway?

How do I do this?

Many thanks.