diff --git a/src/Compatibility/FlarumTags/FlarumTagsPurgeMiddleware.php b/src/Compatibility/FlarumTags/FlarumTagsPurgeMiddleware.php
index 6f1ce3c..4bc3fc3 100644
--- a/src/Compatibility/FlarumTags/FlarumTagsPurgeMiddleware.php
+++ b/src/Compatibility/FlarumTags/FlarumTagsPurgeMiddleware.php
@@ -53,10 +53,18 @@ protected function processPurge(
             $discussionId = Arr::get($payload, 'data.relationships.discussion.data.id');
             if (! $discussionId) {
                 $postId = Arr::get($payload, 'data.id');
+                if (! $postId) {
+                    return $response;
+                }
+
                 $discussionId = Post::find($postId)->discussion_id;
             }
         }
 
+        if (! $discussionId) {
+            return $response;
+        }
+
         $discussion = Discussion::find($discussionId);
         if (! $discussion) {
             return $response;