The INSERT statement conflicted with the FOREIGN KEY constraint

Person.cs (сущность персоны):

public class Person
    {
        private long _id;
        private string _name;
        private string _displayName;
        private List<Skill> _skills;
        public long Id
        {
            set => _id = value;
            get => _id;
        }
        public string Name
        {
            set => _name = value;
            get => _name;
        }
        public string DisplayName
        {
            set => _displayName = value;
            get => _displayName;
        }
        public List<Skill> Skills
        {
            set => _skills = value;
            get => _skills;
        }
        public Person(string name, string displayName, List<Skill> skills)
        {
            Name = name;
            DisplayName = displayName;
            Skills = new List<Skill>();
            for (int i = 0; i < skills.Count; i++)
            {
                Skills.Add(new Skill(skills[i].Name, skills[i].Level/*, Id*/));
            }
        }
        private Person() { }
    }

Skill.cs (сущность навыка):

 public class Skill
    {
        private long _id;
        private string _name;
        private byte _level;
        private long _personId;
        [Key]
        public long Id
        {
            set => _id = value;
            get => _id;
        }
        public string Name
        {
            set => _name = value;
            get => _name;
        }
        public byte Level
        {
            set => _level = value;
            get => _level;
        }
        public long PersonId
        {
            set => _personId = value;
            get => _personId;
        }
        public Skill(string name, byte level)
        {
            Name = name;
            Level = level;
        }
    }

POST запрос:

[HttpPost]
public void Post()
       {
            Skill attentiveness = new Skill ("attentiveness", 2);
            List<Skill> skills = new List<Skill> {attentiveness};
            Person person = new Person("Igor", "newVoitje", skills);
            _context.Skills.Add(attentiveness);
            _context.Persons.Add(person);
            _context.SaveChanges();
        }

С помощью миграций создаю БД:

Пытаюсь выполнить POST запрос и вылазит ошибка:

SqlException: The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Skills_Persons_PersonId". The conflict occurred in database "DbHallOfFame", table "dbo.Persons", column 'Id'. The statement has been terminated.

Обыскал все ресурсы, все равно не могу решить проблему