SAP Message BBP_SOC_APP_01024 - External requirement was changed by creating system

Diagnosis
A shopping cart item is to be transferred from the worklist to the workarea. This item is an external requirement that was changed in thesystem in which it was created.
As soon as an external requirement is changed in the creating system,it is only displayed for information purposes in Sourcing and cannot beprocessed further.

System Response
The shopping cart item is not transferred to the work area.