So I wanted to add the new mexico class into the game, but since I lack modeling experience I thought "Hey, the South Dakota looks kinda like the new mexico if you squint both eyes, so let's just copy it's data and replace relevant stuff"

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So I did, I replaced the guns with the japanese 36cm guns, the speed was reduced to 21 knots, I renamed all the south dakota files in the new mexico folder to "new_mexico..." and added it into unit, all units list and language and it even showed up in the museum.

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I could choose it, but when I did, no ship would load in (except the wake texture) and time was stopped, so does anyone know what the issue is?