WIP process order on transaction KKAO

Hi Gurus

I have a process order in WIP on transaction KKAO.

When i run KKAO i have a positive value on columns WIP(Cumul) and WIP(Period ) ,two values are equals.

I don't know what is the problem, other similar process orders have value zero on column WIP(Cumul) and WIP(Period )

Can you help me ?

Thanks in advance

Regards