RX651 series - R5F5651EHGFP MCU Error while flashing

In our project,we are using RX651 series - R5F5651EHGFP MCU. Initially one program was flashed in all MCU's and working properly.While try to reprogram the MCU through JTAG with  the new SW,it is showing the below error.Same code is flashed in Multiple MCU's but some MCU is throwing error.

 

 

please help us to solve this issue