How to programmatically create a Workflow Transition

Do these transitions still work? I was running into issues integrating this into either hook_entity_update() or hook_ENTITY_TYPE_update()

Check workflow.module file.
Transitions are saved upon presave()

Thank you. I am now getting the following error when using the presave hook.

Drupal\Core\Entity\EntityStorageException: Value is not a valid entity. in Drupal\Core\Entity\Sql\SqlContentEntityStorage->save() (line 817 of core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php).

Can you share your code and the call stack?

Here is the code. I have a ton of use statements in there due to earlier testing. Error output is below the code.

<?php

/**
 * @file
 * Contains mymodule.module..
 */

 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Field\Entity\BaseFieldOverride;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\gin\GinSettings;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\node\Entity\Node;
 use Drupal\node\NodeInterface;
 use Drupal\block\Entity\Block;
 use Drupal\Core\Access\AccessResult;
 use Drupal\Core\Session\AccountInterface;
 use Drupal\views\ViewExecutable;
 use Drupal\Core\Url;
 
 use Drupal\workflow\Entity\Workflow;
 use Drupal\workflow\Entity\WorkflowManager;
 use Drupal\workflow\Entity\WorkflowScheduledTransition;
 use Drupal\workflow\Entity\WorkflowConfigTransition;
 use Drupal\workflow\Entity\WorkflowState;
 use Drupal\workflow\Entity\WorkflowTransitionInterface;
 use Drupal\workflow\Entity\WorkflowTransition;
 
 
 // ####################################################
 // WORKFLOW
 // ####################################################

 
function mymodule_entity_presave(EntityInterface $entity) {

if ((!empty($entity)) && ($entity->bundle() == 'event')) {

  if (!$entity->isNew()) {

      dpm($entity);

      $field_name = 'field_event_workflow';
      $next_state = "event_reporting_complete";
      //$entity = \Drupal::entityManager()->getStorage($entity_type)->load($entity_id);
      //$entity = \Drupal::EntityTypeManager()->getStorage($entity->getEntityTypeId())->load($entity->id());

      $current_user = \Drupal::currentUser();
      $current_sid = $entity->$field_name->value;

      dpm($current_user);
      dpm($current_sid);

      if (!$entity) {
            dpm('not entity');
      } else {
            dpm('is entity');
      }

      $entity_id = $entity->id();
      $entity_type = $entity->getEntityTypeId();

      $transition = WorkflowTransition::create([$current_sid, 'field_name' => $field_name]);
      $transition->setTargetEntity($entity);
      $transition->setValues($next_state, $current_user, \Drupal::time()->getRequestTime(), '', TRUE);
      $transition->force($force);

  } 

}
}

Error:

The website encountered an unexpected error. Try again later.

Drupal\Core\Entity\EntityStorageException: Value is not a valid entity. in Drupal\Core\Entity\Sql\SqlContentEntityStorage->save() (line 817 of core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php).
Drupal\Core\Field\FieldItemBase->writePropertyValue('entity', Object) (Line: 131)
Drupal\Core\TypedData\Plugin\DataType\Map->set('entity', Object, ) (Line: 231)
Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem->setValue(Object, ) (Line: 72)
Drupal\Core\TypedData\Plugin\DataType\ItemList->setValue(Array, 1) (Line: 107)
Drupal\Core\Field\FieldItemList->setValue(Array, 1) (Line: 657)
Drupal\Core\Entity\ContentEntityBase->set('uid', Object) (Line: 894)
Drupal\workflow\Entity\WorkflowTransition->setOwnerId(Object) (Line: 185)
Drupal\workflow\Entity\WorkflowTransition->setValues('event_reporting_expired', Object, 1707331982, '', 1) (Line: 127)
bpl_config_entity_presave(Object)
call_user_func_array(Object, Array) (Line: 409)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'bpl_config') (Line: 388)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('entity_presave', Object) (Line: 408)
Drupal\Core\Extension\ModuleHandler->invokeAll('entity_presave', Array) (Line: 217)
Drupal\Core\Entity\EntityStorageBase->invokeHook('presave', Object) (Line: 900)
Drupal\Core\Entity\ContentEntityStorageBase->invokeHook('presave', Object) (Line: 529)
Drupal\Core\Entity\EntityStorageBase->doPreSave(Object) (Line: 753)
Drupal\Core\Entity\ContentEntityStorageBase->doPreSave(Object) (Line: 483)
Drupal\Core\Entity\EntityStorageBase->save(Object) (Line: 806)
Drupal\Core\Entity\Sql\SqlContentEntityStorage->save(Object) (Line: 352)
Drupal\Core\Entity\EntityBase->save() (Line: 270)
Drupal\node\NodeForm->save(Array, Object)
call_user_func_array(Array, Array) (Line: 129)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object) (Line: 67)
Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object) (Line: 597)
Drupal\Core\Form\FormBuilder->processForm('node_event_edit_form', Array, Object) (Line: 325)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 73)
Drupal\Core\Controller\FormController->getContentResult(Object, Object) (Line: 39)
Drupal\layout_builder\Controller\LayoutBuilderHtmlEntityFormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 627)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 38)
Drupal\tracer\StackMiddleware\TracesMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)