Finding my physiologically relevant maximum heart rate
The 220 - age (or any age based formula) is a myth that works well enough for roughly 60% of the population and puts the other 40% wrong. That it persists to this day with such ready access to HR monitors and reasonably accurate sub-maximal tests to determine max HR astounds me.  (I blew over 210 when I was in my early 30's and now over 50 can sustain 170 for a hour and can probably reach 190.)

Training zones based on  max heart rate percentages are based on average people and  well enough for most of the population, but they are guesstimates. You do not gain more accuracy from knowing max HR to a few beat per minute.

Presuming your HR monitor is accurate, your maximum is clearly at least 202.  For defining your training zones, use 200 - its a nice round number.