Bug#1001956: popcon: gpg: 5B1A07804DD558242CF5538215A07BA5233E3E85: skipped: unusable public key

[Thorsten Glaser <tg@mirbsd.de>]

Package: popularity-contest
Version: 1.71
Severity: grave
Justification: renders package unusable

got a cron mail:

Subject: Cron <root@caas> test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )

/etc/cron.daily/popularity-contest:
gpg: 5B1A07804DD558242CF5538215A07BA5233E3E85: skipped: unusable public key
gpg: /var/log/popularity-contest.new: encryption failed: unusable public key
run-parts: /etc/cron.daily/popularity-contest exited with return code 2



-- System Information:
Debian Release: 11.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-10-amd64 (SMP w/1 CPU thread)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/lksh
Init: sysvinit (via /sbin/init)

Versions of packages popularity-contest depends on:
ii  debconf [debconf-2.0]  1.5.77
ii  dpkg                   1.20.9

Versions of packages popularity-contest recommends:
ii  cron [cron-daemon]              3.0pl1-137
ii  gpg                             2.2.27-2
ii  postfix [mail-transport-agent]  3.5.6-1+b1

Versions of packages popularity-contest suggests:
pn  anacron   <none>
pn  tor       <none>
pn  torsocks  <none>

-- debconf information:
* popularity-contest/participate: true
  popularity-contest/submiturls: