I USE Cyclone LC Program the flash. The MCU is KEAZ128, when i use the Security function.

the security data = 0xBF;
the program is error , Cyclone LC display the 4003 err As shown below:

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If i don't use the security function(security data = 0xBE), The program is ok.
I Set the Cyclone LC , delete the verify checksum.the program is ok.

I want to know if my operation is correct and if there is a risk,?
I use the MCU S9KEAZN32 also use the security function, but it don't have the Error. why?
thank you!