SAP Message AH268 - Entry has been made in field &1

Diagnosis
Field &v1& is filled, but it must be blank.

System Response
Check 2 in function module ISU_BILLING_PREPARE_UPDATE found field &v1&,which is not to be filled yet. An entry indicates that an error hasoccurred in the billing program.

Procedure
Program error in billing must be cleared in order that the incorrectdata transfer is stopped.