Test Manager Defect Integration issue with Azure DevOps

While integrating Test Manager with Azure DevOps we have run into an issue where the defects are not transferring due a lack of information within Test Manager that ADO requires.

I am using Tasktop for the integration, so I am able to see what the exact issue is when raising a defect in Test Manager and the issue is:
New artifact has validation errors: Area Path must be specified. Iteration Path must be specified.

For Requirements & Test Case integration, I have been able to resolve this issue, by adding in the necessary fields, via project settings. There doesn’t appear to be an option to add additional fields for defects.

Is there a way to overcome this please?

We are using Area and Iteration path to define teams and sprints within ADO, so this cannot be changed within ADO.