If you specifically saw a map labeled "6.85k" somewhere, it might be a modified version or a fake file. The official AI map developed by the community (led by DracoL1ch) stops at or 6.85b . It is highly recommended to stick to 6.85a as it is the most bug-free version available.
Even with a fresh , you might encounter issues: dota 685k ai map new download
You're interested in the Dota 685k AI map! If you specifically saw a map labeled "6
The 685k AI Map boasts an astonishing 685,000+ lines of code, making it one of the most comprehensive and sophisticated AI-powered maps available. The creator has done an incredible job of integrating advanced AI algorithms, allowing for more realistic and challenging gameplay. 000+ lines of code