Change Order trying to rebuild accounts on closed lines

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Hi team

We are facing an issue where we have a PO with 2 lines which are currently closed of invoicing and having PO charge and PO Variance account combinations which are disabled

Now ,we created a change order with below updates

1. Updated description on Line # 1 and Line # 2 to DO NOT USE - INVOICE # XXXX

2. Added a new Line # 3 with correct PO Charge Account

When trying to submit the Change order , system is not allowing to proceed and says PO charge account and PO Variance account for Line 1 schedule 1 , Line 2 schedule1 has been disabled

How do we stop the system from performing validation on Lines 1 and 2 since they are closed for invocing