Workaround for Bug 17376228 until Bundle 28 can be installed

Current version 9.1 Bundle 26

Reversal of encumbrance doubles when change order is involved and results in negative encumbrance balance. It doesn't matter whether the reversal is produced by finalizing voucher or by closing PO.

Found Extra Row Written to KK_ACTIVITY_LOG when PO Accounting Date is Changed on a Finalized Purchase Order (PO) (Doc ID 1600961.1) that describes Bug 17376228 where solution is stated as Bundle 28.

This documentation sounds like what we are experiencing. Unfortunately, we are not scheduled to upgrade or implement patches for a couple of months. Is there any other type of workaround to solve this problem? We have 3 purchase orders that are causing negative encumbrances in KK Budget Overview.