Warning: Each child in a list should have a unique "key" prop.

I'm getting this warning in my console, because apparently in my component the key is repeated, the thing is i follow this link in the warning: https://react.dev/docs/lists-and-keys.html#keys, and oh surprise i got a 404, so i dont know if im wrong (because im searching and debugging and stills is wrong) or your guys are wrong, i hope you help me with this, please.