Systemctl remove unit from failed list

How can I remove a unit from the systemctl --failed list without rebooting the machine?

Background:
I have, amongst others, the following entry in the list:

● openvpn-server@intranert.service loaded failed failed OpenVPN service for intranert

This happened because I misspelled intranet, which is the actual productive instance, on the unit template's activation some time ago.
However, I now always get confused at first glance, when I check the server's failed units, since it looks like the productive service actually failed until I recognize the spelling mistake and remember my bygone typo.