Youtube help

[suna]

I have gone on to my account on YouTube and i have watched one of my own videos and the sound is missing.
and it says this
Because this video has been claimed by a copyright owner, statistics cannot be made public.
the content i have use is completely what i have created myself and the sound came from one of youtube's audio swaps songs
so why has this happened and why is there no message at all about it anywhere on my account other wise

[squarebear]

But if the song is not your work and you haven't told the original artist you want to use it, it will eventually be removed.