By error, I made in-plan conversion from 401k (pre-tax) to Roth 401k (after tax) 50 days ago in 2021. Is there anyway to fix this?

Accidentally made in-plan conversion from 401k (pre-tax) to Roth 401k (after tax) 50 days ago in 2021, in amount of approx. 150k all at one time. It will bump my tax bracket from 24% to 35%. I didn't file 2021 tax yet but I may owe approx. 60k in tax.  Is there anyway to fix this?