Booting Mismatched

I have Sophos Home Edition and two OS installed (19 and 21).
I want to boot every time from 19, but when I restart the Sophos VM, it boots from version 21.
Is there any way to prevent or remove version 21?

Thanks.



Added V21 TAG
[edited by: Erick Jan at 1:19 AM (GMT -8) on 18 Feb 2025]