Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Keil/AT32F437xx_v2/DAC/STS#0x0
DAC2 status register (DAC_STS)
DAC1 DMA underrun flag
DAC2 DMA underrun flag
https://github.com/cmsis-svd/cmsis-svd-data