case provisions are deleted when case is deleted.

modules/opencase_cases/src/Entity/OCCase.php

@@ -91,6 +91,14 @@ class OCCase extends RevisionableContentEntityBase implements OCCaseInterface
     ];
   }
 
+  public function deleteCaseProvisions(): void {
+    $query = \Drupal::entityQuery('oc_case_provision')
+      ->condition('oc_case.target_id', $this->id());
+    $ids =  $query->execute();
+    foreach($ids as $id) {
+      OCcaseProvision::load($id)->delete();
+    }
+  }
 
   public static function defaultTarget()
   {

opencase.module

@@ -6,6 +6,7 @@
 
 use Drupal\Core\Render\Element;
 use Drupal\Core\Access\AccessResult;
+use Drupal\opencase_cases\Entity\OCCase;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\opencase_cases\Entity\OCCaseProvision;
 
@@ -56,6 +57,10 @@ function opencase_oc_case_provision_update(OCCaseProvision $case_provision): voi
   $case_provision->original->oc_provider->entity->calculateTotalCases();
 }
 
+function opencase_oc_case_delete(OCCase $case): void {
+  $case->deleteCaseProvisions();
+}
+
 /**
  * Implements hook_page_attachments
  *