Goodreads Librarians Group discussion

This currently has an original publication year of 1200, but the Goodreads profile for the author Yusuf Has Hacib says he died in 1077 (the Turkish version of wikipedia also has this date - for some reason, the English wikipedia article on him is a bit of a mess and seems to say he died in the 8th century: the English wikipedia article on the work Kutadgu Bilig also says it was written in the 8th century, whereas the Turkish version says it was completed 1069-1070).

I imagine this may be a little difficult to resolve considering it is not so well-known a work. (Sorry!)

Turkish wikipedia articles:
https://tr.m.wikipedia.org/wiki/Yusuf...
https://tr.m.wikipedia.org/wiki/Kutad...

English:
https://en.wikipedia.org/wiki/Y%C5%AB...
https://en.wikipedia.org/wiki/Kutadgu...