How To Fix WB2_SE_INVC_AGENCY207 - Invoice refers to TC with different sides (sales / purchase)

SAP Error Message - Details

• Message type: E = Error

• Message class: WB2_SE_INVC_AGENCY - Message Class for Invoices (Settlement Management)

• Message number: 207

• Message text: Invoice refers to TC with different sides (sales / purchase)

What causes this issue?

The currently processed invoice item refers to trading contract &V3&,
which has trading contract type &V4&.
The first invoice item refers to trading contract &V1&, which has
trading contract type &V2&.
The trading contracts &V1& and &V2& were created for different sides:
One for the sales side and the other for the purchasing side.
However, this is not allowed. All trading contracts refered to in an
invoice must have been created for the same side: Either sales side or
purchase side.

System Response

Processing of this invoice is not possible.

How to fix this error?

Ensure that all trading contracts referred to in an invoice were created
for the same side.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.