Updating Xamarin.Android.Support libraries fails

Hello

I trying to update libraries from 27.0.2.1 to 28.0.0. But an compatibility error raises.
What I'm doing wrong?
Please help or fix.
Thank you!

Unable to resolve dependencies. 'Xamarin.Android.Arch.Core.Common 26.1.0' is not compatible with 'Xamarin.Android.Arch.Core.Runtime 1.1.1 constraint: Xamarin.Android.Arch.Core.Common (= 1.1.1)', 'Xamarin.Android.Arch.Lifecycle.LiveData 1.1.1 constraint: Xamarin.Android.Arch.Core.Common (= 1.1.1)', 'Xamarin.Android.Arch.Lifecycle.LiveData.Core 1.1.1 constraint: Xamarin.Android.Arch.Core.Common (= 1.1.1)'.