This bug was fixed in the package cups-pk-helper - 0.2.6-1ubuntu1.2
--------------- cups-pk-helper (0.2.6-1ubuntu1.2) bionic-proposed; urgency=medium
* debian/cups-pk-helper.postinst: Do not add cups-pk-helper group, make cups-pk-helper user member of lpadmin group instead (LP: #934291).
-- Till Kamppeter <email address hidden> Wed, 6 Jun 2018 16:23:58 +0200
This bug was fixed in the package cups-pk-helper - 0.2.6-1ubuntu1.2
---------------
cups-pk-helper (0.2.6-1ubuntu1.2) bionic-proposed; urgency=medium
* debian/ cups-pk- helper. postinst: Do not add cups-pk-helper group, make
cups-pk-helper user member of lpadmin group instead (LP: #934291).
-- Till Kamppeter <email address hidden> Wed, 6 Jun 2018 16:23:58 +0200