Auto recovery deleted my latest typed 42 pages

I have been working on a document from page 65 and finished typing 107 pages. I saved and shut down my PC. The next morning I found this auto recovery option popped up and I started auto recovery. As a result after successful recovery I found the document back to page 65. Lost last 42 pages. How can I recover those lost 42 pages I typed? Why would auto recovery delete my pages??

Saving properly auto recovery should not be in place, How is the state of in Menu/Tools/Options/Load&Save- Save auto recovery information every xx it’s not setup?