PO Output triggerd twice with wrong partner

Hi All,

I am facing a issue with PO Output as below:

I have PO output as EDI as well as External Send, EDI is triggered thru a batch job, and immediately system has triggerred exteral send as output to partner VN , who is different than in PO. For e.g. in PO VN is ABC, where as in external send it has taken XYZ.

I have checked in PO for the partner determination, there is no other partner function other than VN and ABC vendor name is shown there.

This has resulted into PO emailed to wrong Vendor.

Can anyone help me to find out the reason ?

Thanks & Regards,

Vikas