SAP Message 5N073 - Conversion rule cannot be updated, field has already been completed

Diagnosis You have selected the option Update Conversion Rule UsingDeviant Conversion Rule (P05_UPDATE_KDLHF). However, the Conversion Rule (KDLHF) field cannot be updated with the valuein the Deviant Conversion Rule (AKLHF) field, because theConversion Rule (KDLHF) field contains a value other than'0' (no conversion). Procedure Check in each case whether the Conversion Rule (KDLHF)field can be replaced with the value in the Deviant ConversionRule (AKLHF) field.