RedBeanPHP: Only first two store functions work

Question

I am currently working on some php code using redbeanphp that should store data into database tables using four different R::store functions, but only the first two work, and I don't know why the other two aren't working because I made no spelling mistakes and if I try to do it with R::storeAll it also only works for the first two objects.

My code:

require "rb.php";

R::setup('mysql:host=localhost;dbname=building_framework', 'root', '');

// Books table
$books1 = R::dispense('books');

$books1->title = "Wonders of the world";
$books1->author_id = "1";
$books1->publisher_id = "1";

$books2 = R::dispense('books');

$books2->title = "Math for dummy's";
$books2->author_id = "1";
$books2->publisher_id = "1";

// Author table
$author = R::dispense('author');

$author->id = "1";
$author->author = "Francesco Boccia";

// Publisher table
$publisher = R::dispense('publisher');

$publisher->id = "1";
$publisher->publisher = "Metro Books";

$store1 = R::store($books1);
$store2 = R::store($books2);
$store3 = R::store($author);
$store4 = R::store($publisher);

echo $store1;
echo $store2;
echo $store3;
echo $store4;

When I execute it, all the tables are getting made, but only in the books table, data is stored and not in the other two. Can someone please help me fixing this?

Answer 1

I know my mistake. I added an id for author and for publisher but the id gets added by redbean itself, so there was no need for that.