We are updating our chart of accounts and need to update the "Income Account" and "Expense Account" on our items.

In the Setup -> Accounting -> Accounting Preferences -> Items/Transactions, there is a check beside "Do not update COGS and asset accounts on existing transactions when accounts are changed. However, when I try to update an expense account on an item, I'm getting this error, "You have changed the account(s) for this item. Click OK to update the accounts on existing transactions, or Cancel to stay on this page." How do I make this update without affecting historical data? We do not want to create new items as we want to keep our historical data.