How to prevent latest version of firmware downloading?

I want to download arducopter 2.9 for apm 2.8 but it keeps downloading 3.2.1. How can I prevent mission planner to download 2.9 instead 3.2.1. I choose previous version correctly but it does download the latest version?

Thank you.

You can’t. It’s going to look here for the firmware target. Do you see 2.9?
https://firmware.ardupilot.org/Copter/

Why in the world would you want that version? Or an APM Flight Controller for that matter.