I cant edit the main database

'Column named Quantity cannot be found.

        TextBox1.Text = DataGridView1.CurrentRow.Cells("Quantity").Value.ToString
        TextBox2.Text = DataGridView1.CurrentRow.Cells("Total").Value.ToString
        TextBox3.Text = DataGridView1.CurrentRow.Cells("Price").Value.ToString
        TextBox4.Text = DataGridView1.CurrentRow.Cells("Description").Value.ToString