ROS locked out after changing username

Hi,
I just changed the username on my RB 2011iL from “admin” to a different one.

I’ve done it from /System/users Then double clicking on the admin’s account and changing “admin”.

This however have locked me out completely and i cannot login to the routerboard, giving me username/password Error.

Can someone please help as i don’t want to do a full reset and reconfigure my RB.

Thanks

Adel