Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H7x5_CM7/RAMECC1/M4FDRL#0x0
RAMECC monitor x failing data low register
Failing data high (64-bit memory)
https://github.com/cmsis-svd/cmsis-svd-data