> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v23** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/ProductLinkErrorEnum.ProductLinkError).

Enum describing possible ProductLink errors.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v23/errors/product_link_error.proto)

| Enums ||
|---|---|
| ## `CREATION_NOT_PERMITTED` | The creation request is not permitted. |
| ## `INVALID_OPERATION` | The requested operation is invalid. For example, you are not allowed to remove a link from a partner account. |
| ## `INVITATION_EXISTS` | A link cannot be created because a pending link already exists. |
| ## `LINK_EXISTS` | A link cannot be created because an active link already exists. |
| ## `UNKNOWN` | The received error code is not known in this version. |
| ## `UNSPECIFIED` | Enum unspecified. |