If the security key identifier does not match the identifier on the controller, locate the correct security key file and then try the validation again.

If the controller cannot decrypt the security key for validation, you might have incorrectly entered the pass phrase. Double-check the pass phrase, re-enter it if necessary, and then try the validation again. If the error message appears again, select a backup of the key file (if available) and re-try validation.

If you still cannot validate the security key, the original file might be corrupted. Create a new backup of the key and validate that copy.