spurious noises on upgrade

really just a cosmetic complaint, but still, i had this during the 0.3.1 to 0.3.2 upgrade:

root@hetzner-nbg1-02:~# apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  onionprobe
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 43.9 kB of archives.
After this operation, 18.4 kB disk space will be freed.
Do you want to continue? [Y/n] 
Get:1 https://db.torproject.org/torproject-admin tpo-all/main amd64 onionprobe all 0.3.2 [43.9 kB]
Fetched 43.9 kB in 0s (930 kB/s)
(Reading database ... 66569 files and directories currently installed.)
Preparing to unpack .../onionprobe_0.3.2_all.deb ...
Unpacking onionprobe (0.3.2) over (0.3.1) ...
Setting up onionprobe (0.3.2) ...
Warning: The home dir /var/lib/onionprobe you specified already exists.
Allowing use of questionable username.
The system user `_onionprobe' already exists. Exiting.
Processing triggers for man-db (2.9.4-2) ...

it seems to me we shouldn't try to recreate the user if it already exists. this doesn't break the upgrade, but might be alarming for newbies...