SAP Netweaver Enterprise Controlling

Symptom

In transaction KEAW in the view CO-PA, there are unexplained differences between CO and CO-PA.
Other terms

KEAW, RKE_RECONCILIATION_SD_CO, deletion flag, PSPNR, COPA
Reason and Prerequisites

In KEAW you analyze, for example, a WBS element to which orders are assigned that are flagged for deletion.
In this case, the system transfers the balances of these orders, which must total zero, to the relevant WBS element.
Therefore, as a total balance of zero is transferred to the WBS element, the CO view is cleared in KEAW. However, the CO-PA view may then display differences, as the credits for these orders are generally not assigned any CO-PA value field.

Solution

The delta is actually justified in these cases, but is not very helpful in the analysis, as the orders to be deleted do not have any profit-related effects.
Implement the attached source code so amounts like this are ignored in KEAW.