As long as the status is not SUCCESS or DELETED, the user can simply restart the process.
You don't need to create a new Ident if the user, for example, aborts the call or drops out because of an internet issue.
Best-practice is to integrate the ability to start an Ident in such a way that the user can easily restart if needed. For example by providing a link to the Ident process.
If an Ident is completed, the user will get a notification that it cannot be restarted, making the customer journey fully transparent.