This bug was fixed in the package ubuntu-keyring - 2020.02.11.4
--------------- ubuntu-keyring (2020.02.11.4) focal; urgency=medium
* Remove expiry of the ddebs.ubuntu.com key. LP: #1920640
-- Dimitri John Ledkov <email address hidden> Mon, 29 Mar 2021 15:29:33 +0100
This bug was fixed in the package ubuntu-keyring - 2020.02.11.4
---------------
ubuntu-keyring (2020.02.11.4) focal; urgency=medium
* Remove expiry of the ddebs.ubuntu.com key. LP: #1920640
-- Dimitri John Ledkov <email address hidden> Mon, 29 Mar 2021 15:29:33 +0100