INSERT INTO via form Error [closed]

I'm trying to insert data via form in PHP. However, I'm having an error, I can not find this error at all.

As I said, I'm wanting to enter data, via SELECT INTO

Please note:

insert.php, it is in this tab that I will enter the data.

<h3>Formulário de Cadastro de Sinaps</h3><br>
  <form name="Cadastro" action="insere_dados.php" method="POST">
    <label>Nome do programa: </label>
    <input type="text" name="programa" size="30"><br>
    <label>versa do programa: </label>
    <input type="text" name="versaoprograma" size="45"><br>
    <label>Data de Publicação: </label>
    <input type="text" name="data" size="45"><br>
    <br>
    <input type="submit" name="enviar" value="Enviar">
  </form>

insert_dates.php, this tab will make the insert.php function

<?php
$programa = $_POST['programa'];
$versaoprograma = $_POST['versaoprograma'];
$data = $_POST['data'];

$strcon = mysqli_connect('localhost','root','','atualizacao') or die('Erro ao conectar ao banco de dados');
$sql = "INSERT INTO geral (nomedopograma, versaodoprograma, datadoprograma) VALUES ('$programa', '$versaoprograma', '$data')";
mysqli_query($strcon,$sql) or die("Erro ao tentar cadastrar registro");
mysqli_close($strcon);
echo "Cliente cadastrado com sucesso!";
?>

update.php, this tab will receive data from insert.php

<?php

// Propriedades BD

define("HOST", "localhost");
define("USER", "root");
define("PASS", "");
define("BDNAME", "atualizacao");

@mysql_connect(HOST, USER, PASS) or die("Não foi possivel se conectar ao servidor");
mysql_select_db(BDNAME) or die("Não foi possível se conectar ao banco de dados") ;

?>


<?php
$sql = mysql_query("SELECT * FROM geral");
while($exibe = mysql_fetch_assoc($sql)){
echo "<ul class='col-md-12 item1'>";

echo "<li class='nomedoprograma'>".$exibe["nomedoprograma"]."</li>";

echo "<li class='versao'>".$exibe["versaodoprograma"]."</li>";

echo "<li class='atualizacao'>".$exibe["datadoprograma"]."</li>";

echo "</ul>";

}
?>

When I fill in the data and click send, the only message that appears is Error trying to register record ,

Database

-- phpMyAdmin SQL Dump
-- version 4.6.4
-- https://www.phpmyadmin.net/
--
-- Host: 127.0.0.1
-- Generation Time: 24-Abr-2017 às 15:32
-- Versão do servidor: 5.7.14
-- PHP Version: 5.6.25


SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET time_zone = "+00:00";


/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8mb4 */;

--
-- Database: 'atualizacao'
--

-- --------------------------------------------------------

--
-- Estrutura da tabela 'geral'
--

CREATE TABLE 'geral' (
  'nomedoprograma' varchar(50) CHARACTER SET utf8 NOT NULL,
  'versaodoprograma' varchar(20) CHARACTER SET utf8 NOT NULL,
  'datadoprograma' date NOT NULL,
  'comentarios' varchar(1024) CHARACTER SET utf8 NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

--
-- Extraindo dados da tabela 'geral'
--

INSERT INTO 'geral' ('nomedoprograma', 'versaodoprograma', 'datadoprograma', 'comentarios') VALUES
('Sinap280', 'Versao 200', '2017-04-24', ''),
('Sinap280', 'Versao 200', '2017-04-24', ''),
('', 'versao100', '2017-04-24', ''),
('Sinap 8024', '1090', '2017-04-24', '');

/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

This is the database.