mass change GR processing time - WEBAZ (EKPO table)

Hi All,

I would like to  mass change  the field WEBAZ from (EKPO table).

When I try to do this manual via ME32L I got no error, but when I try to do it via mass (BUS2013 -  Purch. Sched. Agrmt)  I get the error : Scheduling agreements with time-independent conditions are not supported (MEOUT019). I mention that agreement type is (ZLPA, ZLPL).

Can anyone please help?

Thank you in advance!