I made a project with quickproject:make-project in directory "~/projects/{name}/".
I wasn't happy how it turned out and wanted to start over, so I renamed the directory to "~/projects/{name}-old/" and made a new project with quickproject:make-project in the initial directory "~/projects/{name}/".
If I try to load my project with ql:quickload, quicklisp tries to load the old project.
How do I remove the old system, while keeping the old project files where they are?
What should I have done, instead of renaming the directory in step 2.?