@Janko
I'm here to help! To change the model of Eleven Labs voices in an existing agent, you typically need to access the settings where you can manage your agent's voice models. However, if the platform you're using doesn't allow changes to the voice model after creation, then indeed, you would need to create a new agent and select the desired voice model during the setup process.
If you need assistance with creating a new agent or have any other questions, please let me know, and I'll be happy to guide you through the process!