Topic: NO_PUBKEY BC9F825E1D4FB6C1 - Download for Debian Bookworm
When appending
deb https://debian.qelectrotech.org/qet/builds/debian stable main
to /etc/apt/sources.list and
$ apt update
i get this error message: NO_PUBKEY BC9F825E1D4FB6C1
Furthermore i get a warning that apt-key is deprecated.
How do i install the latest stable QElectrotech under Debian bookworm?