No Mapping Exist

Hello Team, In my window application, tried updating data from the window form into the database and this is the error that is poping up, kindly assist.

 private void btnUpdate_Click(object sender, EventArgs e)
        {
             try
            {
                if (MessageBox.Show("Please confirm if you want to update item bought on credit?", "UPDATE", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {
                    
                    con.Open();
                    cmd = new SqlCommand("update tblOnCredit SET CDate=@Cdate,CDescription=@Cdescription,Qty=@Cqty,CSellingPrice=@CsellingPrice, CAmountPaid=@CamountPaid, CBalance=@Cbalance,CustomersName=@customername,Phone=@phone where CreditId like '" + id + "'", con);
                    cmd.Parameters.AddWithValue("@id", id);
                    cmd.Parameters.AddWithValue("@Cdate", dtStockInDate.Value.ToString("dd-MM-yyyy"));
                    cmd.Parameters.AddWithValue("@Cdescription", txtProduct.Text);
                    cmd.Parameters.AddWithValue("@Cqty", txtQuantity.Text);
                    cmd.Parameters.AddWithValue("@CsellingPrice", txtSellingPrice);
                    cmd.Parameters.AddWithValue("@CamountPaid", txtAmountPaid.Text);
                    cmd.Parameters.AddWithValue("@Cbalance", txtBalance.Text);
                    cmd.Parameters.AddWithValue("@customername", txtCustomersName.Text);
                    cmd.Parameters.AddWithValue("@phone", txtPhoneNo.Text);
                    cmd.ExecuteNonQuery();
                    con.Close();
                    MessageBox.Show("This record has been successfully updated!", "POS", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    Clear();

                }
            }
            catch (Exception ex)
            {
                con.Close();
                MessageBox.Show(ex.Message);

            }
        }
 

 private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            if (dataGridView1.CurrentCell.OwningColumn.Name == "dgvEdit")
            {

                frmOnCreditSalesAdd frm = new frmOnCreditSalesAdd();
                frm.btnAdd.Enabled = false;
                frm.btnUpdate.Enabled = true;
                frm.id = Convert.ToInt32(dataGridView1.CurrentRow.Cells["dgvID"].Value);
                frm.dtStockInDate.Text = Convert.ToString(dataGridView1.CurrentRow.Cells["dgvDate"].Value);
                frm.txtProduct.Text = Convert.ToString(dataGridView1.CurrentRow.Cells["dgvDescription"].Value);
                frm.txtSellingPrice.Text = Convert.ToDecimal(dataGridView1.CurrentRow.Cells["dgvSellingPrice"].Value).ToString("#0.00");
                frm.txtQuantity.Text = Convert.ToInt32(dataGridView1.CurrentRow.Cells["dgvQty"].Value).ToString();
                frm.txtAmountPaid.Text = Convert.ToDecimal(dataGridView1.CurrentRow.Cells["dgvAmountPaid"].Value).ToString("#0.00");
                frm.txtBalance.Text = Convert.ToString(dataGridView1.CurrentRow.Cells["dgvBalance"].Value);
                frm.txtCustomersName.Text = Convert.ToString(dataGridView1.CurrentRow.Cells["dgvCustomerName"].Value);
                frm.txtPhoneNo.Text = Convert.ToString(dataGridView1.CurrentRow.Cells["dgvPhoneNo"].Value);
                MainClass.BlurBackground(frm);
                LoadBoughtOnCreditRecord();
            }
            else if (dataGridView1.CurrentCell.OwningColumn.Name == "dgvDelete")
            {
                if (MessageBox.Show("Please confirm if you want to Delete this record?", "Confirm", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {

                    con.Open();
                    cmd = new SqlCommand("delete from tblOnCredit where CreditId like '" + dataGridView1.Rows[e.RowIndex].Cells["dgvID"].Value.ToString() + "'", con);
                    cmd.ExecuteNonQuery();
                    con.Close();
                    MessageBox.Show("This record has been successfully deleted!", "POS", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    LoadBoughtOnCreditRecord();
                }

            }

        }