Missing values when replacing keys in multidimensional array

I'm trying to replace the keys in my output array. There are missing values. The missing values are ‘Precio’, ‘Monto’, ‘Operaciones’ and ‘Hora’ -- the only values that don't change.

I tried changing the new key name but it didn't worked.

This is the code:

$Datos = array(
    0 => array(
        'Simbolo' => 'AA',
        'Precio' => '$ 49,10',
        'Var. %' => '3.15 %',
        'CC.' => '308',
        'PC.' => '49,00',
        'PV.' => '49,10',
        'CV.' => '455',
        'Precio Ant.' => '$ 47,60',
        'Precio Ape.' => '$ 47,60',
        'Max.' => '$ 49,70',
        'Min.' => '$ 47,60',
        'Vol.' => '107.975',
        'Monto' => '5286485',
        'Operaciones' => '214',
        'Hora' => '16:58:21'
    ),
    1 => array(
        'Simbolo' => 'BB',
        'Precio' => '$ 10,35',
        'Var. %' => '0.98 %',
        'CC.' => '41.034',
        'PC.' => '10,30',
        'PV.' => '10,35',
        'CV.' => '7.993',
        'Precio Ant.' => '$ 10,25',
        'Precio Ape.' => '$ 10,40',
        'Max.' => '$ 10,60',
        'Min.' => '$ 10,25',
        'Vol.' => '607.713',
        'Monto' => '6295575',
        'Operaciones' => '245',
        'Hora' => '16:57:57'
    ),
    2 => array(
        'Simbolo' => 'CC',
        'Precio' => '$ 72,80',
        'Var. %' => '4.52 %',
        'CC.' => '600',
        'PC.' => '72,50',
        'PV.' => '72,80',
        'CV.' => '5.900',
        'Precio Ant.' => '$ 69,65',
        'Precio Ape.' => '$ 72,50',
        'Max.' => '$ 72,90',
        'Min.' => '$ 71,05',
        'Vol.' => '1.205.247',
        'Monto' => '86886544',
        'Operaciones' => '1.246',
        'Hora' => '16:58:44'
    )
);

$OldKeys=array('Simbolo','Precio','Var. %','CC.','PC.','PV.','CV.','Precio Ant.','Precio Ape.','Max.','Min.','Vol.','Monto','Operaciones','Hora');

$NewKeys=array('Accion','Precio','Variacion','CanCompra','PreCompra','PreVenta','CanVenta','PreAnt','PreApe','Max','Min','Vol','Monto','Operaciones','Hora');

$Claves=Array(
    'Simbolo' => 'Accion', 
    'Precio' => 'Precio', 
    'Var. %' => 'Variacion',
    'CC.' => 'CanCompra', 
    'PC.' => 'PreCompra', 
    'PV.' => 'PreVenta',
    'CV.' => 'CanVenta', 
    'Precio Ant.' => 'PreAnt',
    'Precio Ape.' => 'PreApe', 
    'Max.' => 'Max', 
    'Min.' => 'Min', 
    'Vol.' => 'Vol', 
    'Monto' => 'Monto',
    'Operaciones' => 'Operaciones', 
    'Hora' => 'Hora' );




function multi_rename_key(&$array, $old_keys, $new_keys)
{
    if(!is_array($array)){
        ($array=="") ? $array=array() : false;
        return $array;
    }
    foreach($array as &$arr){
        if (is_array($old_keys))
        {
            foreach($new_keys as $k => $new_key)
            {
                (isset($old_keys[$k])) ? true : $old_keys[$k]=NULL;
                $arr[$new_key] = (isset($arr[$old_keys[$k]]) ? $arr[$old_keys[$k]] : null);
                unset($arr[$old_keys[$k]]);
            }
        }else{
            $arr[$new_keys] = (isset($arr[$old_keys]) ? $arr[$old_keys] : null);
            unset($arr[$old_keys]);
        }
    }
    return $array;
}

$Datos=multi_rename_key($Datos, $OldKeys, $NewKeys);
print_r($Datos);