Hi,

At the install guide page 

https://www.openproject.org/docs/installation-and-operations/installation/packaged/#debian-11

is still apt-key add - used but instead of

wget -qO- https://dl.packager.io/srv/opf/openproject/key | sudo apt-key add -

I think it should be 

wget -qO- https://dl.packager.io/srv/opf/openproject/key | sudo tee /etc/apt/trusted.gpg.d/openproject.asc

Am I wrong?

Greetings