If you can’t or don’t want to participate, you can transfer your registration to someone else. More information about this can be find at the question about ‘assign’. You can also choose to participate in the edition of 2022.
Unfortunately it is not possible to cancel your registration. This is because the event was cancelled in 2020, instead of cancelling the registration it is decided then to hold on to the registration and let them remain valid for the edition of 2021. We now also added the option to hold on to it for the edition of 2022.