Restrict permissions for editing test steps

Hi everyone,

I want to restrict permissions for editing Test Steps in Zephyr Squad Data Center. Specifically, I want to achieve that only users of a specific group or those who have a specific project role can add, modify, and delete test steps in an issue. I already managed to forbid deleting or modifying existing test steps by disabeling permissions to edit the issue. However, unauthorized users can still add new steps or modify the order. Is there a way to avoid that?

Thanks