As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEG - ON FLIGHT 2396 (SEA-FCA) AT CRUISE (25000 FEET) THE AFT BAGGAGE DOOR WARNING CAME ON. THERE WAS NO LOSS OF PRESSURIZATION. ACCOMPLISHED CHECKLIST, DEPRESSURIZED AIRCRAFT AND DIVERTED TO GEG, WHERE A UNEVENTFUL LANDING WAS ACCOMPLISHED. ON LANDING THE WARNING LIGHT EXTINGUISHED, THEN CYCLED ON AND OFF DURING TAXI. MAINTENANCE ADJUSTED THE DOOR LOCK PROXIMITY SENSOR. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.