diff --git a/core/lib/threshold.py b/core/lib/threshold.py
index ba1c94b..0a6fe17 100644
--- a/core/lib/threshold.py
+++ b/core/lib/threshold.py
@@ -28,6 +28,7 @@ def escape(obj):
 def sort_data(data):
     for item in data.keys():
         if isinstance(data[item], list):
+            cont = False
             for v in data[item]:
                 if isinstance(v, list):
                     cont = True