Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l4/STM32L4x1/TIM8/OR1#0x0
TIM8 option register 1
External trigger remap on ADC2 analog watchdog
External trigger remap on ADC3 analog watchdog
Input Capture 1 remap
https://github.com/modm-io/cmsis-svd-stm32