This seems to be a Security rule issue.
For troubleshooting , please apply a filter on "ResourceFilter on 'App.Object_*' " and "App_*'
this will list all the rules that is associated for the app objects
Disable all the rules initially within the filter and then try duplicating your apps,
If it works, then reenable each rule individually , you should come across the rule thats blocking the access
Note : There could more than 1 rule thats blocking the access, so you will have to through all your rules within the filter
Finally I found that after adding the 'Update' action to the DataConnection_* resource filter (previously was only 'Read') I am able to correctly duplicate the App.
reddys310 no, there is no Section Access (for the moment)
Thank you so much for help.