The Grandfather Paradox would have no bearing on your past "self", as you entered the VoG at a specific time in the past.
Being "locked out of time", you would only be erased from the point you entered the Vault.
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Basically I agree.
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Also if you're erased from existence, you're erased from existence. You don't get rewritten into existence if you never existed to be written out of existence. You just simply never exist. The atoms that joined together to make you never existed. So it's kind of impossible to say it's a grandfather paradox.