New Copyright rules?

So, while browsing Musescore, I went through my own scores and I noticed this on my arrangement on Bohemian Rhapsody: https://imgur.com/a/qYAwnjb

I don't browse the forums on here often, so I wouldn't know if the rules changed. The whole message didn't state why it just said it was privatized. Kinda confused, is this some new rule where you can't do copyrighted songs or did I not state clearly that I do not own the song?

The arrangement took me 50+ hours to arrange; I put it out there because there wasn't a good arrangement of a quartet Bohemian Rhapsody. I really don't want the arrangement to be privatized, I intended to leave it there so people could practice and perform it.

All of my other arrangements are also copyrighted, does this mean that they could be privatized? I put a lot of effort into them and I really don't want them to be snapped.