F5 1500 version 9.3 cant reset do default help

Hi 
I am having trouble with resetting F5 to default conf ( I am connected via console )
In KB 7550 its written to use : 
init 1 
sys reset 
reboot 

but when I do that I am getting this : 

Are you sure you want to continue?
(you must type 'yes' to continue)yes
Checking system integrity...
ERROR: SM5...G. c /config/bigip/auth/pam.d/radius/system-auth.conf (no backup)
--- System integrity check complete:
1 unrecoverable errors were found.

and after that whole action is cancelled
Does anyone know how to fix that ?