I was needing the extra parameter with apt-get, (my 'usual' way of package management).
]]># apt update
^ That should ask.
EDIT: or
# apt-get update --allow-releaseinfo-change
:~$ sudo apt-get update
Get:1 http://deb.devuan.org/merged beowulf-security InRelease [26.3 kB]
Get:2 http://deb.devuan.org/merged beowulf InRelease [33.8 kB]
Get:3 http://deb.devuan.org/merged beowulf-updates InRelease [26.7 kB]
Reading package lists... Done
E: Repository 'http://deb.devuan.org/merged beowulf-security InRelease' changed its 'Suite' value from 'testing-security' to 'stable-security'
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
E: Repository 'http://deb.devuan.org/merged beowulf InRelease' changed its 'Suite' value from 'testing' to 'stable'
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
E: Repository 'http://deb.devuan.org/merged beowulf-updates InRelease' changed its 'Suite' value from 'testing-updates' to 'stable-updates'
N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.
~$ uname -a
Linux devuan 4.19.0-9-amd64 #1 SMP Debian 4.19.118-2 (2020-04-29) x86_64 GNU/Linux