Services PO Creation With Negative value

Hi all,

I am trying to create a Services PO using the BAPI 'BAPI_PO_CREATE1'

In my scenario, First time PO will create with negative value.

Then I will remove some conditions in Services line.

Then PO value will becomes positive.

When i create the bapi in ME21N, its working fine. Net values of PO become negative.

But When I try the same using the BAPI, net price of the PO stored as 0(ZERO).

If I create a PO with positive value using the same BAPI, everything is fine.

If I change the PO after creation(removing the service line to make bapi value as positive), Net values are doubled since value stored as zero instead of negative value.

Kindly help me to get out of this issue.

Note: I need to create a Services PO with negative value using the BAPI

Thanks in advance.