Installed two accounts on onedrive in error so can't sign in to unlink the accounts.

I added one email account to OneDrive on my desktop PC then in my ignorance added the same account to my laptop. Realising later that I should have added a different email account on my laptop, I did so but now find that when I try to log in for either of the two I get the "You're syncing a different account" message so I can't login with either. That being the case, I can't Unlink one of the accounts, ie the duplicated one from my laptop. Any help would be appreciated.

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