How to restore deleted Field

How to restore deleted Field

I edited a field in zoho form and by accident I deleted a field (email address). The form is ongoing to be filled by respondent. Then, when I checked to the all entries and report, the email address is gone. I checked in audit log, there is a record that I deleted the email address field. How to restore the deleted field? So I can get back the data which are filled by the respondent.

Thank you