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Then answer the questions.
Consider limiting the architecture to amd64 (if that's what you use):
cat <<EOF >/etc/apt/sources.list
deb [arch=amd64] http://deb.debian.org/debian unstable main
deb [arch=amd64] http://deb.debian.org/debian-debug unstable-debug main
deb [arch=amd64] http://deb.debian.org/debian-ports unstable main
EOF
apt-get update
apt-get dist-upgrade -y
apt autoremove -y