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Hi @lestat-jin
There are a few tables such as trade_compressed, marketData and t that shouldn’t be a part of that module.
My thinking is that your instance has been overwritten with another courses data.
If you want a fresh instance of the Joins module, return to the terminal and run:
cd ..
Then run:
rm -rf course-advanced
Return to the course on the academy and click ‘Launch KX Sandbox’.
Let me know if this works!
Many thanks,
Megan