### Summary It is possible to create a new wiki page with the title "pages", as this name is the same as the directory page it will become inaccessible. This bug could also effect other default pages. The page is also reasonably difficult to remove, requiring the user to modify the browser URL to navigate to the edit page. ### Steps to reproduce Create a new wiki page with the title "pages". ### What is the current *bug* behavior? Two pages called "pages" exist, however it is not possible to access the user created page. ### What is the expected *correct* behavior? The wiki should not allow for two pages with the same name to be created, therefore it should report an error when creating the page ### Relevant logs and/or screenshots  ### Output of checks This bug happens on GitLab.com ### Possible fixes Have a sanity check that the page title is not "pages"