diff --git a/db/migrate/20220708204200_remove_orphaned_notifications.rb b/db/migrate/20220708204200_remove_orphaned_notifications.rb
new file mode 100644
index 00000000..c55d8ad6
--- /dev/null
+++ b/db/migrate/20220708204200_remove_orphaned_notifications.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class RemoveOrphanedNotifications < ActiveRecord::Migration[6.1]
+  def up
+    execute "DELETE FROM notifications WHERE target_type = 'Appendable' AND target_id NOT IN (SELECT id FROM appendables)"
+
+    execute "DELETE FROM notifications WHERE target_type = 'Relationship' AND target_id NOT IN (SELECT id FROM relationships)"
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index f4a958cb..8101d9d9 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2022_07_08_203722) do
+ActiveRecord::Schema.define(version: 2022_07_08_204200) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"