Hi @Ghaith Almasri,
The error message you are encountering, "internalFailure", indicates that the Azure OpenAI service has failed unexpectedly. This is often a temporary issue, and retrying the request after some time may resolve it. Ensure that you are attempting to delete the correct resource.
Deleting a fine-tuned model's deployment does not delete the model itself, you can re-deploy it later. You can try deleting the deployment via the Azure AI Foundry portal, via REST API, Azure CLI, or other supported methods. If you are still unable to delete the job, verify that you have the necessary Cognitive Services OpenAI Contributor
role assigned, as even high-level service administrators require this explicit permission for fine-tuning actions.
Please refer to: Delete Fine-tune models.
Thank you.