[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › MapExcessPropertyIssue

Defined in: [packages/common/src/Type.ts:8611](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L8611)

An own property found on a Map value.

## Properties

<a id="key"></a>

### key

```ts
readonly key: string | symbol;
```

Defined in: [packages/common/src/Type.ts:8613](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L8613)

---

<a id="kind"></a>

### kind

```ts
readonly kind: "ExcessProperty";
```

Defined in: [packages/common/src/Type.ts:8612](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L8612)