Configure a principal key or a set of compatible foreign key properties for this relationship error with EF core - .net-core

Question

I am not sure why I am getting this error:
System.InvalidOperationException: 'The relationship from 'Insured' to 'Quote.Insureds' with foreign key properties {'InsuredID' : string} cannot target the primary key {'InsuredID' : string, 'ProducerID' : string} because it is not compatible. Configure a principal key or a set of compatible foreign key properties for this relationship.'
I am trying to configure two keys in the Quote model, one for my Insured model and one for my Producer. I attempted to only have one key before and just use foreign keys but that didnt work.
public class Producer
{
[Key]
public string ProducerID { get; set; }
public string Name { get; set; }
public string Phone { get; set; }
public class Insured
{
[Key]
public string InsuredID { get; set; }
public string NamedInsured { get; set; }
public string Address1 {get; set;}
public class Quote
{
public string InsuredID { get; set; }
public string ProducerID { get; set; }
[ForeignKey("ProducerID")]
public IList<Producer> Producers { get; set; }
[ForeignKey("InsuredID")]
public IList<Insured> Insureds { get; set; }
In my DB context:
protected override void OnModelCreating(ModelBuilder builder)
{
builder.Entity<Quote>().HasKey(q => new { q.InsuredID , q.ProducerID});

Answer 1

It is not possible to reference an array with a key
It needs to be an object rather than a collection.
public class Quote
{
public string InsuredID { get; set; }
public string ProducerID { get; set; }
[ForeignKey("ProducerID")]
public Producer Producer { get; set; }
[ForeignKey("InsuredID")]
public Insured Insured { get; set; }
}