C# System.Data.OleDb.OleDbException: field not updateable

private void button4_Click(object sender, EventArgs e)
{
   
[SPOILER="KOD"]
cmd = new OleDbCommand(" update hastalar set AD = @ad, SOYAD = @soyad, TELEFON = @telefon, GTARIH = gtarih, CTARIH = ctarih, RESIM = resim   where TC = @tc ", con);

    cmd.Parameters.AddWithValue("@tc", textBox2.Text);
    cmd.Parameters.AddWithValue("@ad", textBox3.Text);
    cmd.Parameters.AddWithValue("@soyad", textBox4.Text);
    cmd.Parameters.AddWithValue("@telefon", textBox5.Text);
    cmd.Parameters.AddWithValue("@gtarih", dateTimePicker1.Value.ToString());
    cmd.Parameters.AddWithValue("@ctarih", dateTimePicker2.Value.ToString());
    cmd.Parameters.AddWithValue("@resim", textBox6.Text);
    con.Open();
    cmd.ExecuteNonQuery();
    con.Close();
    MessageBox.Show("Güncelleme İşlemi Tamamlandı");
    listele();
}