bigiprole2 does not exist... PLEASE HELP

I have same error messages.

 

 

BIG-IP1000

 

Version 4.5.14 Build5

 

 

when I change admin's password,

 

the BIG-IP have that messages.

 

---------------------------------------------------

 

Password:

 

Password Again:

 

The "admin" user account is provided as a general purpose BIG-IP

 

account, allowing webserver access, remote login (ssh), and local login.

 

---------------------------------------------------

 

A Serious Error has occurred:

 

Role: bigiprole2 does not exist. Use -R to list roles.

 

---------------------------------------------------

 

 

and admin's password isn't changed.

 

 

What can I do?