Scoping information / Cost Model Not Set ?

Hi, I got a question from a translator.

His words: "I'm putting together my invoice and noticed that there are two tasks where I can't see my amount in the "Scoping information" section. I only see the "Betsson Master Cost Model" there."

I checked the tasks and they both say: 

"Completed Set Cost Model (LIB) step of task 1 in time [00:00:00] on engine [SNJWS219:clone#1551592871:engine#2] with result Cost Model Not Set. Execution output: Different vendors have different cost models assigned to them."


The assignee was changed once.

What can I do here?

Regards,
Henrik