How to retrieve submission data back associated with deleted field?

I edited the form and removed a Paypal payment field. Now all the previous data of payments are gone. How can I get previous submissions containing the payment field I originally had?

Unfortunately, there is not any way to retrieve the data of deleted fields. This is why we show a warning window as the following in order to alert you before deleting the field:

You can revert your form back to previous versions as you can see in this guide. However, it is not possible to retrieve the related data back.