I write a function: createMyForm , I hope that fields[].prop must be the property of initialValue, but this code can’t do it,

type FieldConfig<K> = {
  prop: K;
  value?: any;
}
function createMyForm<
    V extends Record<string, any>,
    K extends string = Exclude<keyof V, symbol | number>,
>(
    { initialValue, fields = [] }: {
    initialValue: V;
    fields?: FieldConfig<K | `${K}.${string}` | `${K}[${string | number}]`>[];
}) { return; }


const initVal = { a: 1, b: '2' };

// why x2 not show error