Continuing fixed project as hourly

What is the best practice for continuing a project as an Hourly contract after the original scope has been fulfilled? The project contract originally was fixed.

Assuming that you have authorization from the client to continue working on the same project and bill your services hourly instead of fixed fee, we recommend that you create a new project with Hourly contract type. You can then change the original project status to Completed to prevent time and expense entries against it. Check CORE Help Center for details.