Google Chrome is starting to auto-delete old history entries - what the hell?

It just deleted everything before 5 months ago. Ugh

The old versions always archived up the history index files like “History Index 2011-09”.

But now “History Index 2011-09” has a very small file size - meaning that it deleted practically everything - as I can now see when I use the Chrome Extension History Calendar.

Alternatively, couldn’t History Calendar be deleting my old history entries? expresses the same concern


Is there any way for me to prevent it from deleting everything now?