Getting instancePath when using with ajv-keywords and uniqueItemProperties

When using alongside ajv-keywords and uniqueItemProperties, how do I get the instancePath of the erroneous record?

My code:

import Ajv from 'ajv';
import addFormats from 'ajv-formats';
import ajvErrors from 'ajv-errors';
import ajvKeywords from 'ajv-keywords';

const ajv = new Ajv({ allErrors: true });
ajvKeywords(ajv, ['uniqueItemProperties']);
addFormats(ajv, { formats: ['date', 'email'], keywords: true });
ajvErrors(ajv);

… and my schema:

export const employeeSchema = {
    errorMessage: {
        uniqueItemProperties: 'What’s going on?',
    },
    items: {
        properties: {
            firstName: {
                errorMessage: { type: 'required; and must be a string' },
                type: 'string',
            },
            lastName: {
                errorMessage: { type: 'required; and must be a string' },
                type: 'string',
            },
            email: {
                format: 'email',
                type: 'string',
            },
        },
        required: [
            'email',
            'firstName',
            'lastName',
        ],
        type: 'object',
    },
    type: 'array',
    uniqueItemProperties: ['email'],
};

And when running against the following data:

[
    {
        email: 'dhachardy@tamu.edu',
        firstName: 2,
        lastName: 'Hachard',
    },
    {
        email: 'dhachardy@tamu.edu',
        firstName: 'Me',
        lastName: 'Hachard',
    },
]

… I get the following errors reported:

[
    {
        "instancePath": "",
        "schemaPath": "#/errorMessage",
        "keyword": "errorMessage",
        "params": {
            "errors": [
                {
                    "instancePath": "",
                    "schemaPath": "#/uniqueItemProperties",
                    "keyword": "uniqueItemProperties",
                    "params": {},
                    "message": "must pass \"uniqueItemProperties\" keyword validation",
                    "emUsed": true
                }
            ]
        },
        "message": "What’s going on?"
    }
]

ajv-validator / ajv-errors

Getting instancePath when using with ajv-keywords and uniqueItemProperties #145