diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e9b4371..4bbb819 100755
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -16,7 +16,7 @@ Generally, the development philosophy is result orientated. This means that anyo
 
 Developers  are encouraged to pick open tasks with high priorities according to their own skill level. Senior developers may  directly assign tasks to developers based on their importance. New  developers may find it easier to start with a task that has a low  priority as they often also have a lower difficulty.
 
-Open tasks can be found in the project overview: [PROJECT.md](../Project/PROJECT.md)
+Open tasks can be found in the project overview: [PROJECT.md](https://github.com/Karaka-Management/Organization-Guide/blob/master/Project/PROJECT.md)
 
 Tasks  currently in development are prefixed in the priority column with an  asterisk `*` and a name tag in the task description of the developer who is working on the task.
 
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 11e2d03..057b4f8 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -49,7 +49,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewMarketingPromotionList(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewMarketingPromotionList(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/Marketing/Theme/Backend/promotion-list');
@@ -73,7 +73,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewMarketingPromotionProfile(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewMarketingPromotionProfile(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         /** @var \phpOMS\Model\Html\Head $head */
         $head = $response->get('Content')->getData('head');
@@ -113,7 +113,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewMarketingPromotionCreate(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewMarketingPromotionCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/Marketing/Theme/Backend/promotion-create');
@@ -134,7 +134,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewMarketingEventList(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewMarketingEventList(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/Marketing/Theme/Backend/event-list');
@@ -155,7 +155,7 @@ final class BackendController extends Controller
      * @since 1.0.0
      * @codeCoverageIgnore
      */
-    public function viewMarketingEventCreate(RequestAbstract $request, ResponseAbstract $response, $data = null) : RenderableInterface
+    public function viewMarketingEventCreate(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : RenderableInterface
     {
         $view = new View($this->app->l11nManager, $request, $response);
         $view->setTemplate('/Modules/Marketing/Theme/Backend/event-create');
diff --git a/Models/PromotionMapper.php b/Models/PromotionMapper.php
index 298fc0c..5fa9e4b 100755
--- a/Models/PromotionMapper.php
+++ b/Models/PromotionMapper.php
@@ -103,7 +103,7 @@ final class PromotionMapper extends DataMapperFactory
     /**
      * Belongs to.
      *
-     * @var array<string, array{mapper:string, external:string}>
+     * @var array<string, array{mapper:string, external:string, column?:string, by?:string}>
      * @since 1.0.0
      */
     public const BELONGS_TO = [