pi gadget is now universal for 20 series.
Can you please create ‘20’ track on the pi gadget?
There is no need for ‘20-pi’ track as it is repetitive with the snap name. The ‘20’ track will make pi gadget follow track names of pc and pi-kernel snaps. After ‘20’ track is available, we will close the ‘20-pi’ track. ‘20-pi’ track never had a stable release yet.
Request for ‘20-pi’ track was at Request for a `20-pi` track for the `pi` gadget snap
Hi,
This is done per my +1 as reviewer Simplified track request process for snaps with predictable cadence.
thank you @roadmr
How come I cannot close old one?
$ snapcraft close 20-pi/edge
Your account lacks permission to close channels for this snap. Make sure the logged in account has upload permissions on '20-pi/edge' in series '16'.You’re fumbling the syntax 
from your command, how can it know which snap you’re referring to?
snapcraft close pi 20-pi/edge is what you want.
Yeah! thank you. I told you it was too many pi !