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I have a program where the user can add profiles, and also edit them. I wanted to make the datagrid view easier to view so I added multiple lines to it, but when I go back to edit the row, make changes to the data base, then save, it adds a whole new set of lines! How can I prevent this? I've tried clearing the datagridview withdataGridView1.Rows.Clear(); but that throws this error: System.ArgumentException: 'Cannot clear this list.'
Here is the code I have written to add multiple lines:

        private void pictureBox1_Click(object sender, EventArgs e)

    {

        tabTasks.SelectedIndex = 1;

        RefreshDBConnection();

        dataGridView1.Rows[0].Cells["FIRST NAME"].Value = dataGridView1.Rows[0].Cells["FIRST NAME"].Value + " " + dataGridView1.Rows[0].Cells["LAST NAME"].Value + Environment.NewLine + dataGridView1.Rows[0].Cells["ADDRESS #1"].Value + " " + dataGridView1.Rows[0].Cells["ADDRESS #2"].Value + Environment.NewLine + dataGridView1.Rows[0].Cells["CITY"].Value + ", " + dataGridView1.Rows[0].Cells["STATE"].Value + " " + dataGridView1.Rows[0].Cells["ZIP CODE"].Value + Environment.NewLine + dataGridView1.Rows[0].Cells["COUNTRY"].Value + Environment.NewLine + dataGridView1.Rows[0].Cells["PHONE"].Value + Environment.NewLine + dataGridView1.Rows[0].Cells["EMAIL"].Value;

    }

And here are tthe lines for editing the profile, if this helps:

        private void buttonSave_Click(object sender, EventArgs e)

    {

        ConnectToDataBase();

        OleDbCommand command = new OleDbCommand();

        command.Connection = connection;

        //string query = "update Profiles set [PROFILE NAME]='" + textBox1.Text + "', [LOGIN EMAIL]='" + textBox2.Text + "', [PASSWORD]='" + textBox3.Text + "', [FULL NAME]='" + textBox4.Text + "', [CARD NUMBER]='" + textBox5.Text + "', [EXP MONTH]='" + comboBox1.Text + "', [EXP YEAR]='" + comboBox2.Text + "', CVV='" + textBox6.Text + "' where  ID='" + Convert.ToInt32(textBox7.Text) + "'";

        string query = "update Profiles set [PROFILE NAME]= @Profile, [FIRST NAME]= @FName, [LAST NAME]= @LName, [ADDRESS #1]= @Add1, [ADDRESS #2]= @Add2, [CITY]= @City, [ZIP CODE]= @Zip, [STATE]= @State, [COUNTRY]= @Country, [PHONE]= @Phone, [EMAIL]= @Email, [CARD TYPE]= @CardType, [CARD NUMBER]= @CardN, [EXP MONTH]= @EXPM, [EXP YEAR]= @EXPY, CVV= @CVV where ID = @Id";

        command.Parameters.AddWithValue("@Profile", txtProfile.Text);

        command.Parameters.AddWithValue("@FName", txtFirstName.Text);

        command.Parameters.AddWithValue("@LName", txtLastName.Text);

        command.Parameters.AddWithValue("@Add1", txtAddress1.Text);

        command.Parameters.AddWithValue("@Add2", txtAddress2.Text);

        command.Parameters.AddWithValue("@City", txtCity.Text);

        command.Parameters.AddWithValue("@Zip", txtZip.Text);

        command.Parameters.AddWithValue("@State", comState.Text);

        command.Parameters.AddWithValue("@Country", comCountry.Text);

        command.Parameters.AddWithValue("@Phone", txtPhone.Text);

        command.Parameters.AddWithValue("@Email", txtEmail.Text);

        command.Parameters.AddWithValue("@CardType", comCardType.Text);

        command.Parameters.AddWithValue("@CardN", txtCard.Text);

        command.Parameters.AddWithValue("@EXPM", comboEXPM.Text);

        command.Parameters.AddWithValue("@EXPY", comboEXPY.Text);

        command.Parameters.AddWithValue("@CVV", txtCVV.Text);

        command.Parameters.AddWithValue("@ID", txtID.Text);

        command.CommandText = query;

        command.ExecuteNonQuery();

        RefreshDBConnection();

        connection.Close();

        MessageBox.Show("Profile Edited");

        this.Close();

    }

and finally, here is a picture of what happens when I edit then save, with some info blocked out, for obvious reasons:

Please let me know if I can give you any more info, thank you! (using c# btw)