Can't fork my own repository

At the very beginning, I successfully forked my repository. Then cloned it. After some time, I deleted the fork through Settings - General - Advanced - Delete this project.
Now I’m trying to fork my repository again, but when I click on the “Fork” button, I see “Go to your fork”; after clicking - the page just reloads.
The previously deleted fork is still visible in “frequently visited projects” (sidebar). When I click on the link I see “404 Page not found”.