Replace signer that has already signed document?

A document was accidentaly sent for the signature to the wrong email address, unfortunately the incorrect person signed the document anyway. The document has two other signers after the first signer.  Can we cancel the first signature on the document and define a new signer? It doesn't look like this is possible in the web ui that I can see, but thought i'd ask here incase anyone else has run into the issue. We'd like to avoid having the user re-submit their entire application.  

Thank you!