AllowUpdate is a property of DefaultableBoolean Enum type so it does not have a Value Property. so basically we retunr the name and value of the Enumtype as a hashtable. you can get the hashtable item with Value key to get the value of the enum.
0 = Default (wich depend on other level setting but it resolve to True if its not set on any parent level)
1 = True
2 = False
this is applied to any property of a DefaultableBoolean type.
I hope this is helpful