As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R TR UNLOCK (C) IN FLIGHT AT 29,000FT 290 KT AMBER REV ICON. T/R APPEARS PHYSICALLY STOWED. EMER STOW PRESSED MSG REMAINED. DURING THE CRUISE, THE FLIGHT CREW RECEIVED A THRUST REVERSER UNLOCKED CAUTION MESSAGE. AFTER COORDINATING WITH DISPATCH AND WORKING THROUGH THE QRH, THE FLIGHT WILL DIVERT TO BUF.