PO confirmation - idoc communication between SAP ERP and SUS

Hi Gurus,

we have problem with PO confirmation from SAP ERP to SUS, after system copy to our test system. We normally sent PO confirmation to SUS by Idoc, but the idoc (message type ORDERS) has status 39, when everything is correct (in production environmen) idoc has status 41. Idoc was sent to SAP PI but in our SRM system (SUS portal) we don´t receive any PO confirmation. When we analyze this issue in Idoc body in SXMB_MONI we found this error message:

<FAULT_TEXT>Error in an XI interface: Partners 0000105921 and 0000113859 may not be different for partner function Supplier Program: SAPLBBP_BD_COMPLETE; Include: LBBP_BD_COMPLETEF0N; Line: 322</FAULT_TEXT>

Any advice?

We made all setting as usual after system copy, copy was made only ERP systems, not SRM systems.

Thanks

Petr