Different release signing key?

In latest version the tag is signed with different unknown (SSH) key: <img width="312" height="320" alt="Image" src="https://github.com/user-attachments/assets/266dd3f1-64ba-40aa-8c69-572f87c1e2bc" /> While older releases signed with GPG key: <img width="312" height="280" alt="Image" src="https://github.com/user-attachments/assets/4d68143c-a910-4ba9-92ec-8eda02a345fd" /> Why is that?