SAP Message AO315 - For dummy record, do not change percentages to &1

Diagnosis
You changed the percentage in the dummy record for &V2& (that is neededtechnically when percentage distributions do not exist) to &V1&percent.
The percentage in the dummy record has to be 0%.

System Response
Saving the data is not possible.

Procedure
Correct your entry.
The key of the initial record is always space.