> [!CAUTION]
> **Caution:** This documentation is for Google Ads API **v24** . The latest active version is [**v26**](https://developers.google.com/google-ads/api/reference/rpc/latest/CustomerManagerLinkErrorEnum.CustomerManagerLinkError).

Enum describing possible CustomerManagerLink errors.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v24/errors/customer_manager_link_error.proto)

| Enums ||
|---|---|
| ## `CANNOT_CHANGE_ROLE_BY_NON_ACCOUNT_OWNER` | Only account owners may change their permission role. |
| ## `CANNOT_CHANGE_ROLE_FOR_NON_ACTIVE_LINK_ACCOUNT` | When a client's link to its manager is not active, the link role cannot be changed. |
| ## `CANNOT_REMOVE_LAST_CLIENT_ACCOUNT_OWNER` | Account should have at least one active owner on it before being unlinked. |
| ## `CANNOT_UNLINK_ACCOUNT_WITHOUT_ACTIVE_USER` | If no active user on account it cannot be unlinked from its manager. |
| ## `DUPLICATE_CHILD_FOUND` | Attempt to link a child to a parent that contains or will contain duplicate children. |
| ## `MANAGER_HAS_MAX_NUMBER_OF_LINKED_ACCOUNTS` | Manager account has the maximum number of linked accounts. |
| ## `NO_PENDING_INVITE` | No pending invitation. |
| ## `SAME_CLIENT_MORE_THAN_ONCE_PER_CALL` | Attempt to operate on the same client more than once in the same call. |
| ## `TEST_ACCOUNT_LINKS_TOO_MANY_CHILD_ACCOUNTS` | The authorized customer is a test account. It can add no more than the allowed number of accounts |
| ## `UNKNOWN` | The received error code is not known in this version. |
| ## `UNSPECIFIED` | Enum unspecified. |