UPDATE: chat history retention

functions.py

@@ -167,11 +167,11 @@ def get_session_history(session_id: str) -> BaseChatMessageHistory:
 def trimMessages(chain_input):
     for storeName in chatHistoryStore:
         messages = chatHistoryStore[storeName].messages
-        if len(messages) <= 2:
+        if len(messages) <= 1:
             pass
         else:
             chatHistoryStore[storeName].clear()
-            for message in messages[-2: ]: 
+            for message in messages[-1: ]: 
                 chatHistoryStore[storeName].add_message(message)
     return True
 
@@ -212,6 +212,7 @@ def answerQuery(query: str, vectorstore: str, llmModel: str = "llama3-70b-8192")
     return {
         "output": chain.invoke(query)
     }
+    
 
 
 def deleteTable(tableName: str):