Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F413xx_v2/IOMUX/REMAP5#0x0
IO MUX remap register 5
I2C1 muxing
I2C2 muxing
SPI1 muxing
SPI2 muxing
https://github.com/cmsis-svd/cmsis-svd-data