ZeroDivisionError: division by zero
File "mspray/apps/main/tasks.py", line 453, in set_district_sprayed_visited
set_sprayed_visited(location)
File "mspray/apps/main/tasks.py", line 338, in set_sprayed_visited
ratio = round((found * 100) / total_structures)
ZeroDivisionError: division by zero
https://sentry.onalabs.org/ona/mspray/issues/72056/