WP appending -2 to the end of my slug. Where are the originals stored so I can delete them?

This can also be caused by uploading images with the same file name as the post/page. In my case, I uploaded an image called ‘careers.jpg’ before I created a page called ‘Careers’, so the page was getting the ‘-2’ appended. To fix it, I just changed the slug on the image, then I was able to change the slug on the page.