Question about access internal flash on STM32H7

My codes are stored on bank2 and I am trying write some manufature data into BANK2 (sector 14) of internal flash.

Howerver it always fail in erase stage dut to the flag of PGSERR is raised.

If I change to write data to bank1 (sector7) this symptom not happen again.

Is there limitation that code cannot access internal flash that within same bank on STM32H7?

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