Formik object value, to match validation schema

[mBarlescu]

Hi, I have my formik values are set up like this, I have a value, fields which is an object of further values:

I'm having trouble matching this format with that for formik errors and proper validation for each key in the fields object.
For example:

I have tried different methods to get errors specific for each key in fields object value, but the best I can get is there being for the value fields as a whole, not specifically for each of its keys.

Thank you