Import Mapping with nested entities

Hi I am using below import mapping to create objects in my database. I however need the object not to exist in both the parent and the child before creating it The following should be possible Device                DeviceModule Device01            Module01 Device02            Module01 Below screen shot is not creating the object if it already exist in the database (Module  01)
1 answers

I saw your screenshot in the other forumpost. The association between Devices and Modules should be * – *. Now your Module01 will get associated with Device01 at first, but then with Device02 when that item gets mapped.