Fix: Undefined array key "object_object_type"

src/Protocol/ActivityPub/Receiver.php

@@ -887,13 +887,13 @@ class Receiver
 				} elseif (($object_data['object_type'] == 'as:Block') &&
 					in_array($object_data['object_object_type'], self::ACCOUNT_TYPES)) {
 					ActivityPub\Processor::unblockAccount($object_data);
-				} elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce'])) &&
-					in_array($object_data['object_object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
-					ActivityPub\Processor::undoActivity($object_data);
 				} elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce', 'as:Create', ''])) &&
 					empty($object_data['object_object_type'])) {
 					// We cannot detect the target object. So we can ignore it.
 					Queue::remove($object_data);
+				} elseif (in_array($object_data['object_type'], array_merge(self::ACTIVITY_TYPES, ['as:Announce'])) &&
+					in_array($object_data['object_object_type'], array_merge(['as:Tombstone'], self::CONTENT_TYPES))) {
+					ActivityPub\Processor::undoActivity($object_data);
 				} elseif (in_array($object_data['object_type'], ['as:Create']) &&
 					in_array($object_data['object_object_type'], ['pt:CacheFile'])) {
 					// Unhandled Peertube activity