This bug was fixed in the package libglvnd - 1.3.1-1ubuntu1
--------------- libglvnd (1.3.1-1ubuntu1) groovy; urgency=medium
* Bump Breaks/Replaces on mesa dev packages to allow upgrades from Ubuntu 18.04. (LP: #1878597)
-- Timo Aaltonen <email address hidden> Tue, 16 Jun 2020 12:10:12 +0300
This bug was fixed in the package libglvnd - 1.3.1-1ubuntu1
---------------
libglvnd (1.3.1-1ubuntu1) groovy; urgency=medium
* Bump Breaks/Replaces on mesa dev packages to allow upgrades from
Ubuntu 18.04. (LP: #1878597)
-- Timo Aaltonen <email address hidden> Tue, 16 Jun 2020 12:10:12 +0300