Installing 2.387.1 before March 30, 2023
The new PGP key is not valid with Jenkins 2.387.1. Use the previous PGP key to install Jenkins 2.387.1 and earlier.
Installing 2.387.1 March 30, 2023 or later
The new PGP key used to sign the Jenkins LTS 2.387.1 deb and rpm files will expire March 30, 2023. Users installing Jenkins LTS 2.387.1 after March 31, 2023 may see a warning or an error noting that the PGP key has expired.
Jenkins LTS 2.387.2 (April 5, 2023) will resolve that warning, so long as the new PGP public key has been installed by following the instructions in the Linux installation page.