How to properly type data in useMutation?

No overload matches this call.
  The last overload gave the following error.
    Object literal may only specify known properties, and 'mutationKey' does not exist in type 'readonly unknown[]'. ts(2769)

useMutation.d.ts(6, 25): The last overload is declared here.

(property) mutationKey? MutationKey | undefined

interface User {
  id: string
  firstName: string
  lastName: string
}

const fetchUser = (id: string) => axios.get<User>(`/user/${id}`)

const FetchUser = () => {
  const { data, mutate } = useMutation<AxiosResponse<User>>({
    mutationKey: ['fetchUser'],
    mutationFn: (id: string) => fetchUser(id),
  })

return <>...</>
}