Can't remove hyphen in permalink

The FAQ page on a clients site has a -2 in the url after FAQ when the link is clicked on and I am not able to get rid of it. There was an FAQ category at one time, would this make this happen and if so, how can I get rid of it? The site is

I solved it. I deleted all of the pages in “trash” and even though none of them were named FAQ, I was able to remove the -2.