What is ‘sc-r-power=48’ mean

GROMACS version:2021
GROMACS modification: Yes

I am trying to simulate a extamlarge system (>200M atoms). the mdrun process error shown 'Fatal error:
sc-r-power=48 is no longer supported

what should I do?

Switch to the far more common soft-core power of 6 or use GROMACS 2020.