v4: get an error "Invalid key: Expected "address" but received undefined" if field is object in valibot schema

Author: tripplicateCreated Feb 15, 2026Updated Feb 16, 2026

What happened?

I use vee-validate and valibot, dependencies in package.json:

json
 "dependencies": {
    "@vee-validate/valibot": "^4.15.1",
    "valibot": "^1.2.0",
    "vee-validate": "^4.15.1",
    "vue": "^3.5.27",
  },

If valibot's schema contains object field an "Invalid key: Expected "address" but received undefined" error is thrown. I think this happens because only for valibot integration meta.initialValues don't set with empty object's literals.

I found this bug when I updated valibot from 1.0.0.beta-3 to 1.2.0, but when I rolled back, the error continued to be thrown

Reproduction steps

  1. Create any valibot schema with object's field
  2. Do not set initial values in useForm

Version

Vue.js 3.x and vee-validate 4.x

What browsers are you seeing the problem on?

  • Firefox
  • Chrome
  • Safari
  • Microsoft Edge

Demo link

https://stackblitz.com/edit/vitejs-vite-st3i7srf?file=src%2FApp.vue

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