According to the Provisions of the Press and Publication Administration on Prohibiting the Use of Chinese Standard Book Number "1", each book in different forms should use an ISBN number. In the following cases, the ISBN number should be used alone:

1, different binding forms of the same book (hardcover, paperback, etc. );

2. Different editions of the same book (revised edition, annual edition);

3. Different folio books with the same content;

4. Books in different text categories with the same content.

So the answer to your question should be to generate a new code.