diff --git a/docs/migration/wsc60/deprecations_removals.md b/docs/migration/wsc60/deprecations_removals.md
index a3d8b3fc..c0756884 100644
--- a/docs/migration/wsc60/deprecations_removals.md
+++ b/docs/migration/wsc60/deprecations_removals.md
@@ -16,6 +16,8 @@ With version 6.1, we have deprecated certain components and removed several othe
 
 - `wcf\system\session\SessionHandler::resetSessions()` ([WoltLab/WCF#3767](https://github.com/WoltLab/WCF/pull/3767))
 - `wcf\system\comment\manager\ICommentManager::canModerate()` ([WoltLab/WCF#5852](https://github.com/WoltLab/WCF/pull/5852/))
+- `wcf\system\box\BoxHandler::createBoxCondition()` ([WoltLab/WCF#5906](https://github.com/WoltLab/WCF/pull/5906))
+- `wcf\system\box\BoxHandler::addBoxToPageAssignments()` ([WoltLab/WCF#5906](https://github.com/WoltLab/WCF/pull/5906))
 
 ### JavaScript
 
diff --git a/docs/migration/wsc60/php.md b/docs/migration/wsc60/php.md
index a0ab0658..82681419 100644
--- a/docs/migration/wsc60/php.md
+++ b/docs/migration/wsc60/php.md
@@ -66,3 +66,25 @@ $event->setDescription(
 );
 $event->setLink($object->getLink());
 ```
+
+## Box Configuration
+
+The Methods `wcf\system\box\BoxHandler::createBoxCondition()` and `wcf\system\box\BoxHandler::addBoxToPageAssignments()` were used for the configuration of boxes during package installation. These methods were deprecated with version 6.1, as they led to an initialization of the box handler and can therefore cause undesirable side effects.
+
+The new commands `wcf\system\box\command\CreateBoxCondition` and `wcf\system\box\command\CreateBoxToPageAssignments` can be used instead.
+
+Example:
+
+```php
+(new \wcf\system\box\command\CreateBoxCondition(
+    'boxIdentifier',
+    'conditionDefinition',
+    'conditionObjectType',
+    ['parameter' => 12345]
+))();
+
+(new \wcf\system\box\command\CreateBoxToPageAssignments(
+    'boxIdentifier',
+    ['pageIdentifier']
+))();
+```