How to use the /backport bot command

[Vladimir Kempik]

Hello
I’d like to understand how to properly use /backport bot command.
I was reading https://wiki.openjdk.java.net/display/SKARA/Backports and can’t get it to work
lets say I want to backport 8261397 to jdk13u-dev. It applies cleanly to 13u-dev.

Docs say I need to write /backport jdk13u-dev  command to the comments of upstream (jdk17) commit.
Doing so results in nothing ( https://github.com/openjdk/jdk/commit/0257caad <https://github.com/openjdk/jdk/commit/0257caad> )
I’ve also tried to use /backport command on the original PR for 8261397, obviously bot answered me - unknown command.

Looking for some help on how to do clean backports without going to CLI.

Thanks in advance, Vladimir.