Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32n6/STM32N645/JPEG/JPEG_HUFFENC_AC1_68#0x0
JPEG Huffman encoder AC1
Huffman code 136
Huffman length 136
Huffman code 137
Huffman length 137
https://github.com/modm-io/cmsis-svd-stm32