Invoice Distribution Corrections requiring Approval

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After an invoice has been processed for payment, if it is discovered the expense was coded incorrectly to the GL, we've always been able to pull up the invoice, cancel the line and enter the correct distribution.  This process did not require approvals within the system.  Since 20C, we've noticed the correction will require a Requester's name in the header and then go through the approval hierarchy.  Is this correct?  While I don't have a problem with these corrections going through the approval workflow, the invoices can sometimes be large dollar and there are many layers of approvals.  Is there