MySql Syntax error

C#
public static void UpdateCustomerName(Customer customer)
{
  string updateName = $"UPDATE client_schedule.customer SET customerName = '{customer.CustomerName}'" +
      $"WHERE customerId = {customer.CustomerID}";
  
  DBConnect.StartConnection(); // Starts the connection
  
  try
  {
    using (DBConnect.Conn)
      using (MySqlCommand cmd = new MySqlCommand(updateName, DBConnect.Conn))
      {
        cmd.ExecuteNonQuery();
      }
    }
  }
  catch (MySqlException ex) 
  {
    DBConnect.StopConnection();
    
    MessageBox.Show(ex.Message);
  }

  DBConnect.StopConnection();
}

C#
public static void UpdateCustomerName(Customer customer)
{
  string updateName = $"UPDATE client_schedule.customer SET customerName = '{customer.CustomerName}'" +
      $"WHERE customerId = {customer.CustomerID}";
  
  DBConnect.StartConnection(); // Starts the connection
  
  try
  {
    using (DBConnect.Conn)
      using (MySqlCommand cmd = new MySqlCommand(updateName, DBConnect.Conn))
      {
        cmd.ExecuteNonQuery();
      }
    }
  }
  catch (MySqlException ex) 
  {
    DBConnect.StopConnection();
    
    MessageBox.Show(ex.Message);
  }

  DBConnect.StopConnection();
}