Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Renesas Electronics/R7FA6T1AD/SRAM/ECC1STSEN#0x0
E1STSEN=0
ECCRAM 1-Bit Error Information Update Enable Register
ECC 1-Bit Error Information Update Enable
0 (0): Disables updating of the 1-bit ECC error information.
1 (1): Enables updating of the 1-bit ECC error information.
https://github.com/cmsis-svd/cmsis-svd-data