Upgrading fine tuned custom extractor processors is now available in Preview

## Feature Feature Upgrading fine tuned [custom extractor](https://cloud.google.com/document-ai/docs/ce-with-genai) processors is now available in [Preview](https://cloud.google.com/products/#product-launch-stages). The feature allows you to fine tune a new processor version with a newer base version, while keeping the configurations of the previously fine-tuned processor version selected. This is available through the UI in the **Deploy & use** tab in the console. This is currently supported for upgrading `pretrained-foundation-model-v1.4-2025-02-05`to `pretrained-foundation-model-v1.5-2025-05-05`. For more information, see [training overview](https://cloud.google.com/document-ai/docs/training-overview#upgrade-ui).