You can clone a complete project, including its issues, components, versions and settings. The Project Clone can be accessed via the Bulk Clone dialog.

When configuring your Bulk Clone, choose “Clone project…” as the “Target project”:

You can now choose the source project where those settings should be cloned from, including the project key and name for the new project:

Once you confirm with “Clone project”, the new project will be created and you can proceed to clone the issues into the new project by continuing with a Bulk Clone.