This bug was fixed in the package debootstrap - 1.0.78+nmu1ubuntu1.4
--------------- debootstrap (1.0.78+nmu1ubuntu1.4) xenial; urgency=medium
* Add (Debian) buster and bullseye as a symlink to sid. LP: #1698686
-- Mattia Rizzolo <email address hidden> Mon, 19 Jun 2017 19:54:11 +0200
This bug was fixed in the package debootstrap - 1.0.78+ nmu1ubuntu1. 4
--------------- nmu1ubuntu1. 4) xenial; urgency=medium
debootstrap (1.0.78+
* Add (Debian) buster and bullseye as a symlink to sid. LP: #1698686
-- Mattia Rizzolo <email address hidden> Mon, 19 Jun 2017 19:54:11 +0200