Sogo Mineo (NAOJ) writes:

the rotator LEDs have already been covered, and we have to uncomment this.

It should be something like:

if exposure.getDateObs() >= datetime.datetime(2018, 1, 1):

return

but exposure.getDateObs() has to be replaced with a correct expression.

Koike-san found at least a field was affected by this bug around (ra, dec) = (157, 0).