Entity Framework Core cannot create Seed with Child objects and GUID's

Let's say I have the following entities:

 public class Artist
 {
     [Key]
     public Guid Id { get; set; }

     [Required]
     public string Name { get; set; }
 }

public class Song
{
    [Key] 
    public Guid Id { get; set; }

    [Required] 
    public string Name { get; set; }

    [Required]  
    public Artist Artist { get; set; }
}

For the Song class I'm trying to create a seed like for example:

modelBuilder.Entity<Song>().HasData(new Song
    {
        Id = Guid.NewGuid(),
        Name = "test",
        Artist = new Artist
        {
            Id = Guid.NewGuid(),
            Name = "test"
        }
    });

This is throwing the following error:

The seed entity for entity type 'Song' cannot be added because there was no value provided for the required property 'ArtistId'.

I have no clue why I keep getting this error. When I try to seed the Artist object only, I have no issues. I also tried referencing an existing Artist object, however the result where the same.

Edit: I forgot to mention that the code can indeed run, however when trying to create a migration through the Add-Migration InitialCreate command, the error shows.