keyError 'session_id' while running service app

[rupeshtiwari]

I am getting this error

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KeyError: 'session_id'
Traceback:

File "/Users/rupeshti/anaconda3/lib/python3.11/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 541, in _run_script
    exec(code, module.__dict__)
File "/Users/rupeshti/workdir/gitbox/langchain-aws-template-main/service/webapp/app.py", line 123, in <module>
    write_chat_message(a, q)
File "/Users/rupeshti/workdir/gitbox/langchain-aws-template-main/service/webapp/app.py", line 114, in write_chat_message
    st.session_state['session_id'] = md['answer']['session_id']
                                     ~~~~~~~~~~~~^^^^^^^^^^^^^^

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