Column map and Unknown column

Model:

    public function columnMap()
    {
        return [
            'date_created'  => 'dateCreated',
            'date_modified' => 'dateModified'
        ];
    }

Controller:

$user = User::findFirst(1);

And...

Column not found: 1054 Unknown column 'User_Users.dateCreated' in 'field list'

I'm using Files for tables metadata. I delete all metadata cache.