using webform to update contact informatin

using webform to update contact informatin

So here is my problem.

I am trying to create a webform where my 'contacts' can update their information, but more importantly where they can upload a 'progress document' to keep me up to date of their progress.

The form works for creating a new contact and uploading a document, the issue comes in when they try to fill out the form a second time to update / add another document.

If i have the 'do not allow duplicate contacts' box checked, then Zoho warns me of a duplicate contact and I have to manually merge the 2 records

if i have the 'do not allow duplicate contacts' box unchecked, then the form creates a second contact with the same information.

Is there anyway around this?