Remove findBy from save at BookRepository.save(Book book)

[pilloPl]

 @Override
    public void save(Book book) {
        findBy(book.bookId())
                .map(entity -> updateOptimistically(book))
                .onEmpty(() -> insertNew(book));
    }

this findBy is only there to have updateOrCreate behavior. But it makes optimistic locking doesn't work. in FindBy we fetch new Version