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See my comment here: https://www.thingiverse.com/thing:3413943/comments/#comment-2334392

I, personally, am happy to remove it, but I'm not sure it's that simple.

As for the little hearts, these were modelled separately but all joined together as one mesh. I'm not familiar enough with TinkerCAD to know why it would have a problem with them.

EDIT: Revised the model. Should be fine now, but let me know.