what would I do to reverse that depreciation catchup and make the CP depre calculate correctly

In January, I made an unamortized adjustment to change the useful life from 4 years to 6 years and change the salvage value from 20% to 10%. This caused a depreciation catchup. January FA books were closed, and February was opened. Now, in February, what would I do to reverse that depreciation catchup and make the CP depre calculate correctly as it should have started in January?