Upload Initial inventory balance in previous month

Dear Experts,

We are having situation where my standard price is Zero in previous month(Dec), and we change the month in mmpv for january. Now we want to upload the inventory in previous month and want to release the price for january by using standard cost estimate. If i upload in the price in previouse month then price change document will posted in previous and current month whichll will impact in releasing the standard cost estimate. Kindly guide us to upload the inventory in previous month before we release the cost estimate for current month. Thanks.

Regards,

SK