diff --git a/app/boxes.py b/app/boxes.py
index e1ee325..549f30e 100644
--- a/app/boxes.py
+++ b/app/boxes.py
@@ -948,8 +948,9 @@ async def save_to_inbox(
         if not relates_to_outbox_object:
             logger.info(
                 "Received a like for an unknown activity: "
-                f"{activity_ro.activity_object_ap_id}"
+                f"{activity_ro.activity_object_ap_id}, deleting the activity"
             )
+            await db_session.delete(inbox_object)
         else:
             relates_to_outbox_object.likes_count = models.OutboxObject.likes_count + 1
 
diff --git a/app/main.py b/app/main.py
index fd339e7..6dc4c2b 100644
--- a/app/main.py
+++ b/app/main.py
@@ -66,9 +66,9 @@ _RESIZED_CACHE: MutableMapping[tuple[str, int], tuple[bytes, str, Any]] = LFUCac
 # TODO(ts):
 #
 # Next:
-# - indieauth
+# - allow to undo follow requests
+# - indieauth tweaks
 # - API for posting notes
-# - outgoing activity for webmentions
 # - allow to block servers
 # - FT5 text search
 # - support update post with history