Enum describing possible asset set link 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/asset_set_link_error.proto)

| Enums ||
|---|---|
| ## `ASSET_SET_LINK_CANNOT_BE_REMOVED` | Cannot remove the asset set link. If a campaign is linked with only one asset set and you attempt to unlink them, this error will be triggered. |
| ## `DUPLICATE_ASSET_SET_LINK` | Cannot link duplicate asset sets to the same campaign. |
| ## `DUPLICATE_FEED_LINK` | For this asset set type, only one campaign to feed linkage is allowed. |
| ## `INCOMPATIBLE_ADVERTISING_CHANNEL_TYPE` | Advertising channel type cannot be attached to the asset set due to channel-based restrictions. |
| ## `INCOMPATIBLE_ASSET_SET_TYPE_WITH_CAMPAIGN_TYPE` | The asset set type and campaign type are incompatible. |
| ## `LOCATION_ASSET_DOES_NOT_MATCH_CAMPAIGN_LISTING_ID` | The location asset in this AssetSet does not match the campaign's listing ID. |
| ## `UNKNOWN` | The received error code is not known in this version. |
| ## `UNSPECIFIED` | Enum unspecified. |