Delete multiple copies of same ringtone on a Moto g stylus?

I have a Moto g stylus. I downloaded a ringtone Coal Miner's daughter. I tried to download another ringtone Ain't No grave. The code for the first song was a lot of letters and every time I tried to put the other ringtone in grave it kept duplicating the Coal Miner's daughter. Now I have like five copies in the list. How do I delete the copies of the coal miners daughter and have one copy in the list.