Unknown Song FIle

[NinjaPhonin]

Hello! I'm trying to get my songs to sync with my phone (for offline download), and I'm trying to delete a song that's a local file on my computer. It's not letting me delete it, and when I removed it from the playlist on my computer, it still stayed on my phone. It's greyed out, the text is like grey. I can't get rid of it. 

[Astame]

Hi there!

You can manually clean your cache by viewing its location in the preferences menu and deleting those files (but that will remove all of your offline content).