Backdoor Roth IRA Contribution

Hi!

 

Last year in 2020, I contributed to my Roth IRA for 2021. I found out later my income for 2021 is higher than usual and now need to do a Backdoor Roth IRA. The issue is ...  I already contributed last year and only this year  rolled over my Regular IRA to a Solo 401k account.  Is there anything I need to do? If anyone can assist. Thanks in advance!