Why Automapper Not set id in the newly created object Using Select

ASP.NET MVC
1

{
modelId: 1,
isRegistered: true,
contact:{
name: ‘Haidar’,
phone: ‘hsa8@gmail.com’,
email:‘03450598318’},
lastUpdate: ‘2000-01-01’,
features: [3,4]

}

I Passed the value in Postman and Map it with automapper to Handle Many to Many Relation Ship. But it Passed 0 insted of the Value 3, 4 .Please Help me. It wastes my 21 days. I am searching for my problem but its not solve

.ForMember(v => v.Features, opt => opt.MapFrom(vr => vr.Features.Select(Id => new VehicleFeature{FeatureId=Id})))