Game crashes when custom costume appears in the list

Hi. The game must be crushing because of all those head bones.

1). Use this addon to remove unused ones from the mesh
2). You should retransfer a uv_1 map
- unfold rig, make feet selectable;
"
- select feet, in 3d view press Shift D, then Esc;
- clone a swimsuit with no sculpted details, export the blend, append it in the scene;
- select feet.001, shift-select the swimsuit mesh, press Ctrl J to join, this will be your source object;
- select your outfit, add data transfer modifier, choose the joined mesh as Source object, set the rest like in the pic, apply;

3). vertex paint the mesh with 00ff00.

you can just clone this outfit, Noctis something it is called, type this word in the search bar when choosing an outfit to clone. You can import your blend there or switch to the warehouse tab, choose CAS part, then type Exclude in the search bar, then copy whatever there is in those fields, then copy-paste them in your package