Going Live, How to catch up depreciation?

We are getting ready to go live with our fixed assets. My question is how is the best way to go about this. We have a different fixed assets program right now and we manually enter depreciaton entries into the G/L monthly. We are now going fully with JDE but are not sure the best way to match up depreciation. Since we cannot void prior months entries in the G/L, is there a way we can just run depreciation on the FA side, then make a correcting entry to the G/L to get both sides to balance?