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I believe you mean upgraded. Given the length of time you are talking about here, you are beyond the DD Form 293 discharge upgrade process statute of limitations. You'd have to file a DD Form 149 with the records corrections board.
You'd have to be prepared to explain why you waited this long to try and upgrade. Furthermore, you'd have to prove that your discharge status was given to you in error or as an injustice. There is no automatic right to upgrade after the passage of time. If you can't show error or injustice, you won't get it upgraded.