Libra Transfer Annotation to different book

Hi,

I have Libra H20 and borrowed a book from a library and read it half way through the book but then the library decided to remove the book from its collections.

Due to this, I downloaded an epub book edition from the internet.

Unfortunately, the annotation did not transferred to the new book (even though it has the same title, author and publishing year).

How do I go about transferring the annotation to another book?

Thanks in advance!