STM8S003: mistake in the Reference Manual?

[MKles]

Hello!

RM on the STM8S003: https://www.st.com/content/ccc/resource/technical/document/reference_manual/9a/1b/85/07/ca/eb/4f/dd/CD00190271.pdf/files/CD00190271.pdf/jcr:content/translations/en.CD00190271.pdf

I see on the page 54, FLASH_FPR/NFPR registers. Why they trimmed to six bit? The datasheet explain that the UBC field is 8 bit wide (0, 1, ...127, (128-255)->128 pages). It is mistake in the RM or not?

Thanks!