Steve added slots game crash (Down Air)

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For some reason, whenever I use Steve with added slots and then use down air, the entire game crashes.

The model for the anvil works fine, (down throw shows the model) so it's just the move itself.

I've tried asking multiple people about this and none of their answers have worked, so I can only assume this is a acropolis issue.
I've tried using ArcExplorer and extracting the move again and putting it under ModName/fighter/pickel/motion/c09.