Enum describing possible custom interest errors.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/errors/custom_interest_error.proto)

| Enums ||
|---|---|
| ## `CANNOT_CHANGE_TYPE` | Cannot mutate custom interest type. |
| ## `CANNOT_REMOVE_WHILE_IN_USE` | Cannot remove a custom interest while it's still being targeted. |
| ## `CUSTOM_INTEREST_MEMBER_ID_AND_TYPE_PARAMETER_NOT_PRESENT_IN_REMOVE` | In the remove custom interest member operation, both member ID and pair \[type, parameter\] are not present. |
| ## `INVALID_CUSTOM_INTEREST_MEMBER_TYPE` | Unsupported custom interest member type. |
| ## `NAME_ALREADY_USED` | Duplicate custom interest name ignoring case. |
| ## `TYPE_AND_PARAMETER_ALREADY_EXISTED` | The pair of \[type, parameter\] already exists. |
| ## `TYPE_AND_PARAMETER_NOT_FOUND` | The pair of \[type, parameter\] does not exist. |
| ## `UNKNOWN` | The received error code is not known in this version. |
| ## `UNSPECIFIED` | Enum unspecified. |