Hi,
Can you provide the code you have used to update partner value through order_maintain.
Hope the input fields for IT_PARTNER in maintain FM is passed properly.
You can execute crm_order_read in SE38 by providing your transaction number and check ET_PARTNER for PARTNER_FCT = employee responsible. Accordingly you can pass the values for IT_PARTNER in order_maintain FM.
Are you trying to remove employee responsible partner function and update reviewer partner function or are you trying to update the review bp no in employee responsible partner function.
Best Regards,
Kiruthika K.