"It was to Traditional IRA for 2020"

So, now you have both a Nondeductible Trad IRA contribution for 2020 as well as the $6k you told us got put into the Roth for 2020?

Or, you need to go back to confirm the amount moved from Roth to Traditional, while working on the 2019 tax form, even though it was moved in 2020, was still considered a 2019 contribution.

Because now, for 2020, you seem to have excess contribution.