Will I have to pay my ACA subsidy back since I liquidated my Roth IRA in 2017? It puts me over the limit for subsidy.

I was using ACA medical insurance for 6 months in 2017 - then I turned 65 and got on Medicare.  I liquidated a Roth IRA in 2017 and the amount might put me over the subsidy limit.  Will I have to pay back all of the subsidy?