Library suddenly duplicated

Hi all,

I recently updated to 10.15.1, and now I find that my Music library has more or less duplicated. I am an iTunes Match subscriber, and now all my original files that were matched or purchased are listed as "removed", with duplicates from the cloud now showing up in my library? What happened? Is there a fix? I can't seem seem to find this issue having popped up with anyone else yet.

Thanks for any insights.

-R