Diagnosis
You have assigned a DataSource (source system) to the InfoSource (BWsystem) in the active version (A version). However, this assignment ismissing in the delivered version (D version).

Procedure

Checks and corrections in the BW system (Administrator Workbench:Transfer rules for InfoSource)
Do you want deliver the assignment of the DataSource (source system)
to the InfoSource (BW system)? In this case, regenerate the transferrules.