You could do it with the REST api if you are programatically inclined. Or if this is a one off kind of thing you ould try an add-on from the marketplace that could do it. I've provided a link below (I've no affiliation with them).
Hi my Community friends! For those who don't know me, I'm a product marketer on the Confluence Cloud team - nice to meet you! For those of you who do, you know that I've been all up in your Co...
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