RADIUS policy variable access is not allowed

Logged when policy reads a write-only RADIUS variable, writes a read-only variable, appends to an identifier, modifies a request identifier in server mode, or uses numeric attribute access for a write. This also includes native Radconf attempts to modify a proxy reply during pre-proxying or a proxy request during post-proxying. The policy_path and operation fields identify the variable and rejected operation. The radius_mode or proxy_phase field is present when the exchange direction affects access.

Change the policy to use a writable variable and a supported modification operation.