diff --git a/parks/management/commands/parks2neighborhoods.py b/parks/management/commands/parks2neighborhoods.py
index 2d92b02..884ac46 100644
--- a/parks/management/commands/parks2neighborhoods.py
+++ b/parks/management/commands/parks2neighborhoods.py
@@ -12,5 +12,6 @@ def handle(self, *args, **options):
         parks = Park.objects.all()
         for park in parks:
             neighborhoods = Neighborhood.objects.filter(geometry__intersects=park.geometry)
+            park.neighborhoods.clear()
             park.neighborhoods.add(*neighborhoods)
             self.stdout.write('Updated "%s"\n' % park.name)