> [!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/AssetGenerationExistingContext).

The context for which assets are being generated, such as an existing AssetGroup or AdGroupAd.

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

| Fields ||
|---|---|
| ## `existing_context` Union field. An existing context to generate assets for. `existing_context` can be only one of the following: ||
| ### `existing_ad_group_ad` | `string` Resource name of an existing AdGroupAd for which these assets are being generated. |
| ### `existing_asset_group` | `string` Resource name of an existing AssetGroup for which these assets are being generated. |