How accurate are people with migraine at determining their triggers?

Curelator data indicates people with migraine are not very acccurate at determining their triggers:
Migraineurs’ suspected triggers vs associations statistically determined using a digital platform
Stephen Donoghue PhD, Paul R. Martin DPhil1, Gabriel Boucher BSc, Francesc Peris PhD and Alec Mian PhD Curelator Inc. Cambridge, MA, USA and 1School of Applied Psychology, Griffith University, Queensland, Australia