SAP Note 17898 - FBKP: Deleting old accounts does not work

Symptom:

In account determination, deleting the old account allocation possibly does not work after changing the rules (for example, dependency on tax code on/off).
Key words: FBKP SAPDFKB1 T030 T030R

Cause and prerequisites

Error.

Solution
Corrected for Release 3.0A. Interim correction:
/NSE38 - DFKB1F00, FIND UPDATE_030R

FORM UPDATE_030R.
...
MODIFY T030R.
PERFORM SOLL/HABEN_GEAENDERT.
SAVET030R = T030R.
IF AUSW-GRUPP = CONTX. <-- insert
TBNAM = '030K'. <-- insert
ELSE. <-- insert
TBNAM = '030'. <-- insert
ENDIF. <-- insert
PERFORM ALTE_KONTEN_LOESCHEN.

DFKB1F00 cannot be checked alone, also check /NSE38 - SAPDFKB1 .