BundleClassInheritanceException

After running update as admin each try to open a page (admin page or regular page) results in an error message. I did try to run rebuild.php but to no avail.
The error occurs also in other sites.

After drush cr still the same error.

I installed v3.0 and patched it with the code from https://git.drupalcode.org/project/book/-/merge_requests/166/diffs.
After running the update I got this message:

book-module
#103007 update

Failed: Drupal\Core\Entity\Exception\BundleClassInheritanceException: Bundle class Drupal\my_node\Entity\Bundle\PersoonNode does not extend entity class Drupal\book\Entity\Node\Book. in Drupal\Core\Entity\ContentEntityStorageBase->getEntityClass() (line 216 of /xxx/web/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php).

I got the same error again. But this time not in the update.php page (I am using the UX) like yesterday.
I see some differences with my module. I hope this can help you in testing.

The bundle is defined in my module with name my_node.

use Drupal\my_node\Entity\Bundle\myTest;

/**
 * Implements hook_entity_bundle_info_alter().
 */
function my_node_entity_bundle_info_alter(array &$bundles): void {
  if (isset($bundles['node']['test'])) {
    $bundles['node']['test']['class'] = myTest::class;
  }
}

The actual class is in:
myTest.php
myTestInterface.php

myNode.php:

namespace Drupal\my_node\Entity\Bundle;
use Drupal\node\Entity\Node;
class myTest extends Node implements myTestInterface {
  public function myTestAction(): void {
//    do something.
  }

  public function preSave(EntityStorageInterface $storage) {
    $this->myTestAction();
    parent::preSave($storage);
  }
}

I ran composer update to todays 3.0-dev.
Then update.php
Still the same error
Then I did all update s from:
3574779-bundle-class-alternative Comparechanges, plain diff Status: PassedMR !168 mergeable
Hide branch
3574779-bundleclassinheritanceexception Comparechanges, plain diff MR !166

Again update.php. Still the same error.
Should I update only according to:
3574779-bundle-class-alternative Comparechanges, plain diff Status: PassedMR !168 mergeable
Hide branch
3574779-bundleclassinheritanceexception Comparechanges, plain diff MR !166

I installed the 3.0-dev version and applied !168. After updating I didnt get an error.
Viewing a book goes ok.
I created a new entry for a book. I was not able to add it to the book. First I tried twice in edit mode. Then I tried outline mode and then I got this error:
Drupal\Core\Database\IntegrityConstraintViolationException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '75' for key 'PRIMARY': INSERT INTO "book" ("nid", "bid", "pid", "weight", "depth", "p1", "p2", "p3", "p4", "p5", "p6", "p7", "p8", "p9") VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9, :db_insert_placeholder_10, :db_insert_placeholder_11, :db_insert_placeholder_12, :db_insert_placeholder_13); Array ( [:db_insert_placeholder_0] => 75 [:db_insert_placeholder_1] => 72 [:db_insert_placeholder_2] => 72 [:db_insert_placeholder_3] => 0 [:db_insert_placeholder_4] => 2 [:db_insert_placeholder_5] => 72 [:db_insert_placeholder_6] => 75 [:db_insert_placeholder_7] => 0 [:db_insert_placeholder_8] => 0 [:db_insert_placeholder_9] => 0 [:db_insert_placeholder_10] => 0 [:db_insert_placeholder_11] => 0 [:db_insert_placeholder_12] => 0 [:db_insert_placeholder_13] => 0 ) in Drupal\mysql\Driver\Database\mysql\ExceptionHandler->rethrowNormalizedException() (line 83 of /xxx/web/core/modules/mysql/src/Driver/Database/mysql/ExceptionHandler.php).

The website is created in Drupal 4, upgraded to D5, D6, D7, D9, D10 and now in D11. The book pages are basic_pages assigned to the book.

The good news is: the book structure in the database is updated and correct. And the new entry can be found in the book.

I did a install on a new site with version 3.0.1.
I am missing the bar at the bottom showing the title of the previous book, Up, and the title of the next book.

When I merge !168 I have these problems:
Go to /admin/structure/book/1 I get an page not found
When I goto /book-1 (the first book page created I get a message something goes wrong:

AssertionError: assert($node instanceof Book) in assert() (line 80 of modules/contrib/book/src/Controller/RouteAccessController.php).

Drupal\book\Controller\RouteAccessController->checkIfBookHasChildren() (Line: 60)
Drupal\book\Controller\RouteAccessController->access()
call_user_func_array() (Line: 66)
Drupal\Core\Access\CustomAccessCheck->access()
call_user_func_array() (Line: 160)
Drupal\Core\Access\AccessManager->performCheck() (Line: 136)
Drupal\Core\Access\AccessManager->check() (Line: 93)
Drupal\Core\Access\AccessManager->checkNamedRoute() (Line: 333)
Drupal\Core\Menu\LocalTaskManager->getTasksBuild() (Line: 375)
Drupal\Core\Menu\LocalTaskManager->getLocalTasks() (Line: 275)
Drupal\navigation\NavigationRenderer->getLocalTasks() (Line: 319)
Drupal\navigation\NavigationRenderer->hasLocalTasks() (Line: 248)
Drupal\navigation\NavigationRenderer->removeLocalTasks() (Line: 111)
Drupal\navigation\Hook\NavigationHooks->blockBuildLocalTasksBlockAlter() (Line: 460)
Drupal\Core\Extension\ModuleHandler->alter() (Line: 91)
Drupal\block\BlockViewBuilder->viewMultiple() (Line: 34)
Drupal\block\BlockViewBuilder->view() (Line: 152)
Drupal\block\Plugin\DisplayVariant\BlockPageVariant->build() (Line: 274)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 131)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() (Line: 246)
Symfony\Component\EventDispatcher\EventDispatcher::{closure:Symfony\Component\EventDispatcher\EventDispatcher::optimizeListeners():241}() (Line: 206)
Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (Line: 56)
Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (Line: 188)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 118)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 92)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 53)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 54)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 745)
Drupal\Core\DrupalKernel->handle() (Line: 19)

1. Bar at bottom: thats new for me. Thanks.
Of course I did a clear cache.

I reinstalled v3.0.1 and added the current MR !168. Thanks: Great result. It works now.

Sorry, I have to reopen the issue. In a second site I updated the module to v3.0.2, updated the site and cleared caches.
I went to a book page and got this error:
Error: Call to undefined method Drupal\mynode\Entity\Bundle\CommonNode::getBook() in Drupal\book\Hook\BookHooks->nodeView() (line 184 of /xxx/web/modules/contrib/book/src/Hook/BookHooks.php).
In mynode\Entity\Bundle\CommonNode I don't use any reference to a book.
I presume in line 184 $node->getBook(); is not specific enough.