https://userapps.support.sap.com/sap/support/knowledge/en/3499961
3499961 - Transaction KO02 - error KO288 issued when trying to change company code | SAP Knowledge...
Error KO288 issued when trying to change company code in transaction KO02
https://userapps.support.sap.com/sap/support/knowledge/en/3516695
3516695 - FAQs regarding custom fields in Internal order master maintenance transactions(KO02,...
Queries when customer-specific fields need to be maintained within the master data of internal orders during single processing (KO01/KO02) or collective...
custom fields