mysql - PHP Column not found in a different query

I've a script in PHP to store data in a database. The
script is called functions.php, this is its
content:

class
            LoginRegister{
 function __construct($db){
 $this->db=
            $db;
}


public function
            regEventoPreesc($evento1,$desc1,$evento2,$desc2){
 $query =
            $this->db->prepare("INSERT INTO 001_preesc(dia,descripcion) VALUES
            (?,?),(?,?),(?,?),(?,?)");

            $query->execute(array($evento1,$desc1,$evento2,$desc2));
 return
            true;
}

public function
            regEventoPrim($evento1,$desc1,$evento2,$desc2){
 $query =
            $this->db->prepare("INSERT INTO 002_prim(dia,descripcion) VALUES
            (?,?),(?,?),(?,?),(?,?)");

            $query->execute(array($evento1,$desc1,$evento2,$desc2));
 return
            true;

}

public function
            regEventoSecu($evento1,$desc1,$evento2,$desc2){
 $query =
            $this->db->prepare("INSERT INTO 003_secu(dia,descripcion) VALUES
            (?,?),(?,?),(?,?),(?,?)");

            $query->execute(array($evento1,$desc1,$evento2,$desc2));
 return
            true;
}

public function regMes($mes){
 $query =
            $this->db->prepare("INSERT INTO mes(mes) VALUES (?)"); //LINE
            29

 $query->execute(array($mes));
 return
            true;
}
}

When
I call regMes function, it stores the data correctly on de database, but when I call
regEventoSecu, regEventoPrim and regEventePreesc functions through a html form I get
this error:

PHP
Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42S22]: Column not
found: 1054 Unknown column 'dia' in 'field list'' in
/home/noewebst/public_html/act_eventos/functions.php:29

Stack
trace:

thrown in
/home/noewebst/public_html/act_eventos/functions.php on line
29

This
is the form to save data.

            
session_start();
require_once "functions.php";
$db = new
            DatabaseConnection();
$user = new
            LoginRegister($db->pdo);

$uid =
            $_SESSION['uid'];

$username =
            $_SESSION['uname'];

if(!$user->getSession()){

            header('Location: login.php');

            exit();
}
?>





            

 if($_SERVER['REQUEST_METHOD'] ==
            'POST'){
 $evento1=$_POST['evento1'];

            $desc1=$_POST['desc1'];
 $evento2=$_POST['evento2'];

            $desc2=$_POST['desc2'];

 $register =
            $user->regEventoPreesc($evento1,$desc1,$evento2,$desc2);



            if($register){
 echo "Data succesfully saved";
 }

            }
?>




             action="" method="post" name="reg">

 











            
  
            placeholder="Descripción">
 
            
  
            placeholder="Descripción">
 
            
             onclick="return(submitreg());">
            
 

 

            


             href="actualizar.php">Regresar