MPM-DOH is the first, this error appears between NRT and SIN

Whole itinerary

MPM-DOH-MAD-DXB-LHR-JFK-LAX-NRT-SIN-MEL-CPT

I was originally looking at:

MPM-DOH-MAD-DXB-LHR-JFK-YVR-HKG-TYO-SIN-MEL-CPT

but kept getting the error between TYO ans SIN