Basically a mini Y2K for GPS timestamps. It is recommended that you verify the firmware on your GPS equipment so that is will not be affected by this rollover. Do you know if a firmware update to you graph will also update the firmware on those little GPS pucks as well?

A couple of helpful links

https://www.energy.gov/oe/articles/april-2019-global-positioning-system-gps-week-number-rollover
https://www.usno.navy.mil/USNO/time/gps/gps-week-number-rollover