i took screenshots of both the rapier and katana page, and both are the same recipe, making one, in my survival playthrough, the katana uncraftable.

GOB bundles Polymorph for recipe conflicts in <1.3.0, so it is still craftable. In the latest version (>1.3.0), the katana recipe has been mirrored, and Polymorph has been removed. The wiki needs to be updated to reflect that.

thanks