Back Rent Lump Payment For Multiple Past Years

In 2022, a tenant was approved for a state aid program.  I was paid a lump sum for back rents from 2019, 2020, 2021 and 2022.  All those years, I simply reported the real (partial) rents they had paid.  In 2022, does 100% count as income in 2022? Or is there a way to spread it over the years it was due?