changing primary key of parent table

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changing primary key of parent table

I want to change one primary key from a table where primary key is auto created? How can I do that? I have tried UPDATE person SET personid=3494 WHERE personid=8483; and i get the following error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'upate person set personid=3494 where personid=8483' at line 1

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