[Bugfix]

cron.py

@@ -44,8 +44,6 @@ def update_missing_value(maintainer, player, property, value):
     cur = conn.cursor()
     cur.execute(query, (maintainer, player, property, value))
     conn.commit()
-    cur = Null
-    conn = Null
 
 def cron():
     query = """SELECT player_properties.maintainer,