This bug was fixed in the package ubuntu-keyring - 2020.06.17.3
--------------- ubuntu-keyring (2020.06.17.3) groovy; urgency=medium
* Remove expiry of the ddebs.ubuntu.com key. LP: #1920640
-- Dimitri John Ledkov <email address hidden> Mon, 29 Mar 2021 15:28:00 +0100
This bug was fixed in the package ubuntu-keyring - 2020.06.17.3
---------------
ubuntu-keyring (2020.06.17.3) groovy; urgency=medium
* Remove expiry of the ddebs.ubuntu.com key. LP: #1920640
-- Dimitri John Ledkov <email address hidden> Mon, 29 Mar 2021 15:28:00 +0100