As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 6453 LGA TO DFW ON CLIMB OUT CREW RECEIVED "BLEED 1 OVERPRESSURE" EICAS AMBER MESSAGE FOLLOWED BY "BLEED 1 LEAK" MESSAGE AND BLEED 1 BUTTON AMBER ILLUMINATION. CREW FOLLOWED QRH, AND DIVERT TO IAD. MTX VERIFIED NO ACTUAL LEAK THROUGH CMC. ONLY INDICATION FROM OVERPRESSURE. NR 1 BLEED OPS CHECKED GOOD. DISCREPANCY HAS NOT REPEATED.