Some old distributions on apt.postgresql.org that are EOL will be moving to https://apt-archive.postgresql.org/:
* jessie-pgdg
* wheezy-pgdg
* eoan-pgdg
* disco-pgdg
* trusty-pgdg
* precise-pgdg
To allow systems still using these distributions to upgrade smoothly, the repository files will stay on apt.postgresql.org until the end of March 2021; the files are already available on apt-archive. No updates will be provided for these anymore.
Christoph