diff --git a/recommendation_engine.py b/recommendation_engine.py
index cf8cbc0..4a8b075 100644
--- a/recommendation_engine.py
+++ b/recommendation_engine.py
@@ -9,6 +9,7 @@ import logging
 import os
 import random
 import time
+import copy
 
 import ox
 
@@ -188,7 +189,7 @@ class Engine:
         gridChange = {k: v.get('value', 0) for k, v in self.state['gridChange'].items()}
 
         # Exclude playlists from the most recent grid 
-        playlists = self.playlists
+        playlists = copy.deepcopy(self.playlists)
         if len(vids_exclude) > 0:
             for playlist in playlists:
                 if playlist["name"] in vids_exclude: