As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TAKEOFF CONFIG TESTED NORMAL FOR TAKEOFF ON INITIAL TAKEOFF. PASSING APPROX 25 KNOTS WITH POWER ADVANCING, RED ECAM ALERTED FOR PARKING BRAKE SET, TAKEOFF REJECTED. WARNING EXTINGUISHED WHEN FIRST OFFICER TOUCHED THE PARKING BRAKE HANDLE WHICH WAS DOWN. NO WARNING INDICATED ON THE SUBSEQUENT TAKEOFF, COULD NOT DUPLICATE. PERFORMED OPERATIONAL TEST OF PARKING BRAKE IAW MM 32-45-00-05. OPERATIONS CHECKED GOOD.