My Ring cc glitching in game

Hi. The ring deforms because it has no proper uv_1.
- select the ring, add Data transfer modifier, choose "top" as source object, set the rest like in the pic, make sure to click on UVs button, click Apply;

That said, your ring is very high poly, like 100 times more high poly than it could be. If you plan on sharing your cc with other people, you should avoid this, it will negatively affect the game performance of other people, they will simply delete it and never download from you again