Trying to use different market_tuning but it crashes with bad mod data

I cloned market_tuning from the attributes menu and made some changes to my clone. I then cloned default under worldbp. In my cloned copy, I changed market_trade_module\market_tuning to point to my cloned tuning. When I run the game it crashes. If omit that last step, it will run but won’t have my changes. Any idea on how to fix this?