Update search_utils.py

search_utils.py

@@ -287,7 +287,7 @@ class SemanticSearch:
             
             # Deduplicate and sort results
             pre_dedup = len(results)
-            results = results.drop_duplicates(subset=["title").sort_values("similarity", ascending=False).head(top_k)
+            results = results.drop_duplicates(subset=["title"]).sort_values("similarity", ascending=False).head(top_k)
             post_dedup = len(results)
             
             if pre_dedup > post_dedup: