don't include null values

etl/src/data/database.py

@@ -538,6 +538,8 @@ class Database:
 				consultancy_d.properties ON properties.id = extractions.property_id 
 			WHERE
 				type == 'calendar'
+			AND
+				calendarBody NOT NULL
 			""")
 
 	def capacity_comparison_of_region(self, region_id_1, region_id_2):