O Slug já está ocupado

Pretty Links 2.0.0 and newer should be far less affected by this type of conflict than prior 1.x.x versions. However, on occasion there will still be conflicts between the slug you’re trying to use for a Pretty Links and some other content on your site.

1. The first thing to do is try and visit the URL with the slug you’re trying to use and see if anything obvious exists at that URL. If so, you’ll need to change that item’s slug before you can use it in Pretty Links.
2. Se nada aparecer na etapa 1 acima, é provável que você tenha um item de anexo de mídia ou um item de menu (Appearance -> Menus) que tenha esse slug reservado, portanto, pesquise e verifique se não há conflitos nessas duas fontes.
3. The last option would be to use a plugin like Adminer or your webhost’s phpMyAdmin tool to search your wp_posts table for anything with a “post_name” equal to the slug you’re trying to use.

   SELECT * FROM wp_posts WHERE post_name LIKE '%slug-here%';

4. If you’re unable to find the conflict, feel free to fill out a solicitação de suporte e faremos o possível para ajudá-lo. Também é altamente recomendável fornecer acesso de administrador ao seu site no tíquete de suporte.