The trade of the villagers from previous versions are not updated in the new version.

The trade of the villagers from previous versions are not updated in the new version. An example is with the booksellers that in previous versions a book with a quill gives you emeralds but the new villagers booksellers give 2 books with a quill for emeralds but the villagers are not updated their trades and this can affect updating the next trades in the future.