Fix KPIEncoder caught in name to label property renaming.

functions/classes.py

@@ -266,5 +266,5 @@ class KPIEncoder(json.JSONEncoder):
         if isinstance(o, uuid.UUID):
             return "kpi-" + str(o)
         if isinstance(o, (AggregationLayer)):
-            return "kpi-" + o.properties.label
+            return "kpi-" + o.name
         return super().default(o)
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