Why does the lastInsertId of pdo always return 1?

function execute($pdo, $sql="select version();", $params=[])
{
    $stmt = $pdo->prepare($sql);
    $ret = $stmt->execute($params);
    $lastId = $pdo->lastInsertId();
    if ($ret && $lastId) {
        return $lastId;
    } else {
        return false;
    }
}

lastId1id
Php
Mar.01,2021
Menu