A doctor friend of mine once joked that it would be really cruel to issue a death certificate for someone who is alive. This seems to be a soft version of that. The only thing that would be crueler is to revoke someone's birth certificate. "Sir, you never existed in the first place."
Instead of an entry into the adoption registry, they created a new death certificate, and a backdated new birth certificate. A lot of government systems collapse when it turns out you are two people.