Update incident created by anonymous user

Summary:

Is it possible to update an incident which was created on submit of the interview in the previous stage?

Content (required):

I have an interview to created new incident when first stage is submitted. In the next screen, the interview collects more fields and the incident should be updated when final submit button is clicked.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):