Adjusting Purchase Price of Business Asset

We paid off an asset (vehicle) early and when finalizing the numbers in QBO, I realized that the final cost of the asset was $1,000 less that what was entered into the asset worksheet when we first put the vehicle into service. That amount was due to reductions in GAP insurance.  The original cost I used was what was on our sales contract.  Can I go into the asset worksheet and change the amount?  If not, how to I account for it?