The key for signing user actions was moved into deployment and will be generated if not present.
If you are upgrading existing deployment that uses user actions you should keep using the old key
so the user actions keep working. To use the legacy key add file keys/user_actions/primary.key
to the deployment with the following content. Kqz0EyLw6HKcLRv222S6U3v1h6T
Follow the guide in keys/user_actions/README.md in empty deployment to rotate keys afterwards.
Note if you can easily recompute all scenarios you can also use the default generated key and just
recompute all scenarios generating user actions.