A problem with the MINIPIX Pixhawk firmware

I am the owner of one of the cheapest px MINI PIX Pixhawk 2.4.8 .Version: 5, Board ID: 20, Flash size: 1032192.
In the initial setup phase, I ran into several problems. When trying to flash the latest, stable version, an error appears:
Successfully decompressed image
Image size of 1637 is too large for board flash size 1032192
Upgrade cancelled.
And when I try to flash older, lighter versions, this error appears:
Download firmware board id does not match hardware board id: 9 != 20
Image load failed
Upgrade cancelled
Please help! I have learned my lesson and will no longer buy cheap flight controllers and go to bed at 4 a.m. going through the firmware all night.