title: Vee Validate with Vuedraggable
body: <p>I tried using <code>Vee-Validate (FieldArray)</code> with <code>vuedraggable</code> but it fails saying <code>Set operation on key failed: target is readonly</code>.</p>
  <p>Reproduction Link:
  <a href="https://codesandbox.io/s/vee-validate-array-fields-forked-18l85h?file=/src/App.vue" rel="nofollow noreferrer">https://codesandbox.io/s/vee-validate-array-fields-forked-18l85h?file=/src/App.vue</a></p>
  <p>Anyone who implemented it successfully, please give me suggestions!</p>
  <p>TIA</p>