How to Change the Account Value after production.

Hi,

We are in production now. we retired a few assets recently,  that are not fully depreciated so they have  some balance on them, and found that the balance ( cost minus the accumulated depreciation)  is accounted for a wrong account.

We need to change a few of the retirement accounts for the corporate Book ( we have only one). We can change account value under book control - natural accounts but  this new account will be picked only for new assets but we need to change the natural account (Net Book Value account)  on the existing assets as well so that when they are retired they get the new account.