P0911 revise amount in PV voucher (Doc ID 2540011.1)

I went through the resolution attached to this document and not sure how to execute step 4 with P0911 to revise PV with correct amount. My understanding is that P0911 doesn't save a single leg account entry. Before batch is posted, "AE" doc associated with PV is invisible, Do you know how to use P0911 to revise amount in PV voucher before it is posted?

Below is the resolution provided in the document (Doc ID 2540011.1):

To resolve the issue requires assistance from IT with SQL. With IT assistance, follow the steps below to fix the data, post the voucher and reverse the voucher.