Custom Access Level issue in XI 3.1

Hi,

I am using BOXI 3.1 with fp 1.5, this configuration is migrated from XI3.0.

Earlier we have access level such that user can modify the webi report in folders but they can't overwrite the report, they can save the report in their personal folder but not in same folder or any folder under public folder.

After migration users can't see the modify option at all, and if i gave then edit object rights then they can see the modify option but they can overwrite at the same time.

Is there any other rights which i need to provide.

Thanks for the help/suggestion.