When i am integrating with unity ads from the tutorial of unity itself this error shows up.

Assets/simpleAds.cs(9,17): error CS0433: The imported type `UnityEngine.Advertisements.Advertisement’ is defined multiple times

I Just updated to 5.2.1, and received this error message, all search results seems to be recent, apparently it’s a new issue, will dig around and come back if i have a solution.

thanks For the replay i understand the problem with latest unity services u don’t need the unity ads plugin from the assets store. just copy the example code and past. so i understand the whole thing but when i enable the test mode from services and after adding that code in my starting game scene nothing happens no errors, no crashes, nothing happens. what’s the problem now it don’t show me a demo ads.
so please replay if u have any solution.