New Kobo showing Series for books I don't have

I just received a new Kobo Clara Colour, set it up in SideloadedMode and transferred my book library from Calibre. This is the same library I have on my Kobo Libra 2, by the way. Everything is working great except I have these random Series for books I don't have in my library and I can't figure out how to get rid of them.

Does anyone have any idea how these got there and how I can get rid of them?

Note: These do not show up on my Libra 2 and never have.

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