After upgrade RB133C from 4.17 to 5.11 the rb can`t boot from the nand , after that i made a netinstall with 5.12 and right now it lost
his license key , some idea how to fix this ?

I had the same thing happen to me with a 433. It originally was 2.9 I upgraded it to 4.16 then to 5.11. I didn't know there was a upgrade limit of 2 levels. It bricked on me. I would expect an error message indicating that it had exceeded the limit and cancel the upgrade. Could that be the problem with your board? I haven't tried netinstall.