How to relocate DDEV project that was moved to different directory?

Scenario

• DDEV project has been moved from /home/old-path/project-name to /home/new-path/project-name
• executing ddev start in new location shows the following error

Unable to get project(s): stat /home/old-path/project-name: no such file or directory

Question

Which steps are required in order to "relocate" the directory and get DDEV up and running again?

Please ddev stop --unlist <project> to stop (and forget) the project, then ddev start in the new directory.

This is also in the FAQ.