Trouble installing parrot-sphinx

On their Installation procedure page, when I do a sudo apt-get update from the /etc/apt/sources.d/sphinx.list file I get the error “Err:4 buster/ InRelease
403 Forbidden [IP: 80]
Reading package lists… Done
E: Failed to fetch 403 Forbidden [IP: 80]
E: The repository ‘[same address as above, due to new user restrictions]’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.”

After reading the manual on “apt-secure”, I tried changing the sphinx file deb [the address generated by the code from the installation page] adding deb [ allow-insecure=yes trusted=yes allow-downgrade-to-insecure=yes ] …

I have also succesfully installed everything by following their installation page.

I am using Debian 10 (buster) with kernel “Linux debian 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2 (2019-08-28) x86_64 GNU/Linux”.

Debian buster is going to be supported in next release of Sphinx, which should arrive within shortly.

Will it be possible to use Debian buster and checking scripts and communicating with the drone Parrot Bebop 2 FPV (either simultaneously or physically) albeit I will use the parrot-sphinx on another installation (Debian stretch) and from the stretch copy needed files to buster. What I have in mind is, install stretch so I can use the parrot-sphinx (simulator?) when I have not much access to the physical drone, and from stretch take all the coding I have done and run it on buster to check the code will work with a real live physical drone? I hope you know what I mean.