ODPM-154 - fix db constraint logic
ODPM-154 - fix db constraint logic

I wasn't previously collecting these on a freshly created/migrated
db, but instead on one that had the wrong contraints set in place
during import.

OpenDataPolicingNC/Traffic-Stops,OpenDataPolicingNC/Traffic-Stops,OpenDataPolicingNC/Traffic-Stops,OpenDataPolicingNC/Traffic-Stops