Recommended Mitigation
It is recommended to delete unused role assignment. For more information: <a href="https://docs.microsoft.com/en-us/azure/role-based-access-control/troubleshooting#role-assignments-with-identity-not-found" target="_blank" rel="noopener noreferrer">https://docs.microsoft.com/en-us/azure/role-based-access-control/troubleshooting#role-assignments-with-identity-not-found</a>