This bug was fixed in the package python-apt - 1.1.0~beta1ubuntu0.16.04.9
--------------- python-apt (1.1.0~beta1ubuntu0.16.04.9) xenial; urgency=medium
* Don't duplicate disabled sources during add() (LP: #1311056)
-- Dave Jones <email address hidden> Fri, 24 Jan 2020 22:05:23 +0000
This bug was fixed in the package python-apt - 1.1.0~beta1ubun tu0.16. 04.9
--------------- beta1ubuntu0. 16.04.9) xenial; urgency=medium
python-apt (1.1.0~
* Don't duplicate disabled sources during add() (LP: #1311056)
-- Dave Jones <email address hidden> Fri, 24 Jan 2020 22:05:23 +0000