How to auto-renumber chapters

[Sharon Kimble]

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I'm writing a fiction book, and have just added several chapters from a 
previous draft to it.

As a result I now have

** Chapter 2
blah     

** Chapter 2
blah de blah

** Chapter 3
more blahing

How can I get these new chapters to autorenumber themselves please, so that 
they will show Chapter 2, Chapter 3 and Chapter 4?        

Thanks
  Sharon.
- -- 
Debian 12.6, Fluxbox 1.3.7, emacs 31.0.50, org 9.7.10 
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