Might be worth a try. Though I don’t really expect it to work. Did you delete the old account in Outlook as Johanna suggested and than add the account you want? Did that somehow fail?
Funny I can log out of one drive no problem and no need to remove app and re-download it!! But with outlook there is no log out option only delete account and all that does is just logs me out and same thing if I remove the app and download it again.