`schemaPath` in `ajv.errors` does not show complete path info

**What version of Ajv are you using? Does the issue happen if you use the latest version?**
8.6.0

**Ajv options object**

```javascript
{}
```

**JSON Schema**

```javascript
var schema = {
"$schema": "http://json-schema.org/draft-07/schema#",
"additionalProperties": false,
"definitions": {
"Def2": {
"additionalProperties": false,
"properties": {
"prop3": {
"type": "string"
},
},
"required": [
"prop3"
],
"type": "object"
},
"Def1": {
"additionalProperties": false,
"properties": {
"condition": {"$ref": "#/definitions/Def2"},
"prop2": {
"enum": [
"good_enum"
],
"type": "string"
}
},
"required": [
"prop2"
],
"type": "object"
}
},
"properties": {
"prop1": {
"items": {
"$ref": "#/definitions/Def1"
},
"type": "array"
}
},
"required": [
"prop1"
],
"type": "object"
}
```

**Sample data**

```javascript
var data = {
"prop1": [
{
"prop2": "bad_enum",
}
]
}
```

**Your code**

Full code: https://runkit.com/yilu1021/60d870c41eee9b001af6d9ff
```javascript
var Ajv = require('ajv'); //version 8.6.0
ajv = new Ajv({});
var validate = ajv.compile(schema);
validate(data);
console.log(validate.errors);
```

**AFTER validation, error messages**
validate.errors:
```
[{
"instancePath": "/prop1/0/prop2",
"schemaPath": "#/properties/prop2/enum",
"keyword": "enum",
"params": {
"allowedValues": ["good_enum"]
},
"message": "must be equal to one of the allowed values"
}]

```

**What results did you expect?**
`schemaPath` should list the full path like below, instead of what's shown above.
```
[{
"instancePath": "/prop1/0/prop2",
"schemaPath": "#/definitions/Def1/properties/prop2/enum",
"keyword": "enum",
"params": {
"allowedValues": ["good_enum"]
},
"message": "must be equal to one of the allowed values"
}]
```

Note that if you comment out the schema section highlighted in red rectangle below, then `schemaPath` does print out the full path (full code: https://runkit.com/yilu1021/60d881b9065cb6001a57b04c):