Can't map my domain class to resource class when I create a new object using automapper

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C#

AutoMapper

I have a dotnetcore 2.0 angular project. Inside the project, I have Project, Owner, and Status domain classes. The relationships are like below: 1 Owner can have multiple Projects, 1 Project should have only one status.

I use AutoMapper to map those classes in order to create API resources. My domain classes are:

public class Owner
{
    public int Id { get; set; }

    [Required]
    [StringLength(255)]
    public string Name { get; set; }

    [StringLength(255)]
    public string Email { get; set; }

    [StringLength(255)]
    public string Phone { get; set; }

    [StringLength(255)]
    public string Title { get; set; }

    public DateTime? Updated { get; set; }

    public ICollection<Project> Projects { get; set; }

    public Owner()
    {
        Projects = new Collection<Project>();
    }
}

Status Class:

public class Status
{
    public int Id { get; set; }

    [StringLength(255)]
    public string Name { get; set; }

    public ICollection<Project> Projects { get; set; }

    public Status()
    {
        Projects = new Collection<Project>();
    }
}

Project class:

public class Project
{
    public int Id { get; set; }

    [Required]
    [StringLength(255)]
    public string Name { get; set; }
    public string Description { get; set; }

    [StringLength(255)]
    public string Development { get; set; }

    [StringLength(255)]
    public string Production { get; set; }

    [StringLength(255)]
    public string Link { get; set; }

    [StringLength(255)]
    public string DbName { get; set; }
    public DateTime? DueDate { get; set; }
    public DateTime? Updated { get; set; }

    public int OwnerId { get; set; }

    public Owner Owner { get; set; }

    public int StatusId { get; set; }

    public Status Status { get; set; }
}

My resources classes are identical to the domain classes temporarily. Here is my project resource class that causes the problem:

public class ProjectResource
{
    public int Id { get; set; }

    public string Name { get; set; }
    public string Description { get; set; }
    public string Development { get; set; }
    public string Production { get; set; }
    public string Link { get; set; }
    public string DbName { get; set; }
    public DateTime? DueDate { get; set; }
    public DateTime? Updated { get; set; }
    public OwnerResource Owner { get; set; }
    public StatusResource Status { get; set; }
}

Here is my MappingProile class:

public class MappingProfile : Profile
{
    public MappingProfile()
    {
        //Domain to API Resource
        CreateMap<Owner, OwnerResource>();
        CreateMap<Project, ProjectResource>()
        .ForMember(pr => pr.Owner, opt => opt.MapFrom(p => p.Owner.Projects))
        .ForMember(pr => pr.Status, opt => opt.MapFrom(p => p.Status.Projects))
        .ForMember(pr => pr.Status, opt => opt.MapFrom(p => new StatusResource{Id = p.Status.Id, Name = p.Status.Name}))
        .ForMember(pr => pr.Owner, opt => opt.MapFrom(p => new OwnerResource{
            Id = p.Owner.Id, 
            Name = p.Owner.Name, 
            Email = p.Owner.Email, 
            Title = p.Owner.Title, 
            Updated = p.Owner.Updated
            }));
        CreateMap<Status, StatusResource>();

        //API Resource to Domain
        CreateMap<OwnerResource, Owner>()
        .ForMember(o => o.Id, opt => opt.Ignore());
        CreateMap<ProjectResource, Project>()
        .ForMember(p => p.Id, opt => opt.Ignore())
        .ForMember(p => p.Status, opt => opt.MapFrom(p => p.Status.Name))
        .ForMember(p => p.Owner, opt => opt.MapFrom(p => p.Owner.Name));
    }

}

This profile class is giving me the projects without any problems. However, when I create a new project using controller classes, it gives me this error :
InvalidOperationException: The property 'OwnerId' on entity type 'Project' has a temporary value. Either set a permanent value explicitly or ensure that the database is configured to generate values for this property.

I am guessing I have mistakes inside the mapping profile class. Please let me know if this information is enough or you need more details.

What I have tried:

I've changed Mapping profile class.
Modified domain and resources classes.