HI,
I’m sorry, I don’t know how to reply to you in the post?I have to send you a message?
About software channel sync. 
I want to ask you how to add the gpg key in the repository configuration , (i accustomed to use WebUI)
And , How to run the command from the Âcli ? i thinlk it may be solve my problem.
I’m a rookie and I’d like to hear from you very much <3