You should be using a new ISBN for a new print version of the book to avoid confusion.
An ISBN is a unique identifier that identifies different versions of a book from each other in retail, as well as differentiates between different books with similar titles. It isn't so much of an issue with digital content, as most retailers use their own identifiers, but the ISBN is essential in print because it differentiates between editions. If a bookstore wants to make sure they have the newest edition of your book, they will need to reference the ISBN number. If you recycle the same ISBN number over and over, bookstores don't know which version of the book they might end up with.
A new edition with a new title is going to require a new title page and a new cover. You can't just change the metadata and not change the actual book. And if you are making changes to the title page and the cover, you really should also issue a new ISBN so that people know this is a new edition.
Title page should reflect "second printing" or "second edition" with a new copyright date.
Look at it this way, twenty years from now when you are famous and people are studying your work in schools, that original 'first edition' will be worth a fortune.
An ISBN is a unique identifier that identifies different versions of a book from each other in retail, as well as differentiates between different books with similar titles. It isn't so much of an issue with digital content, as most retailers use their own identifiers, but the ISBN is essential in print because it differentiates between editions. If a bookstore wants to make sure they have the newest edition of your book, they will need to reference the ISBN number. If you recycle the same ISBN number over and over, bookstores don't know which version of the book they might end up with.
A new edition with a new title is going to require a new title page and a new cover. You can't just change the metadata and not change the actual book. And if you are making changes to the title page and the cover, you really should also issue a new ISBN so that people know this is a new edition.
Title page should reflect "second printing" or "second edition" with a new copyright date.
Look at it this way, twenty years from now when you are famous and people are studying your work in schools, that original 'first edition' will be worth a fortune.