Discrepancy between STM32CUBEPROGRAMMER and reference manual

[Maaz1]

Hi all

For the STM32U5, the reference manual shows the GCCFG register as

but STM32CUBEIDE shows

bit 16(and a lot of other bits) are differing. Is this an error and if so which is the right one

[Maaz1]

STM32U5 series Arm<Sup>®</Sup>-based 32-bit MCUs - Reference manual