This bug was fixed in the package apt - 2.1.18
--------------- apt (2.1.18) unstable; urgency=high
* pkgcachegen: Avoid write to old cache for Version::Extra (Closes: #980037) * Adjust apt-mark test for dpkg 1.20.7
-- Julian Andres Klode <email address hidden> Wed, 13 Jan 2021 17:37:30 +0100
This bug was fixed in the package apt - 2.1.18
---------------
apt (2.1.18) unstable; urgency=high
* pkgcachegen: Avoid write to old cache for Version::Extra (Closes: #980037)
* Adjust apt-mark test for dpkg 1.20.7
-- Julian Andres Klode <email address hidden> Wed, 13 Jan 2021 17:37:30 +0100