The tag alias #81466 invalid -> invalid_tag has been approved.
Reason: Apparently, this isn't already a thing?
Invalid is vague and could mean a bunch of things (e.g., not valid, illogical, disabled), but colloquially it could be mistaken for invalid_tag or tags in the Invalid category on this site.
It has been erroneously used before numerous times in tagging and in forum requests (e.g., topic #34240, topic #59560, topic #59909, topic #61402).
EDIT: The tag alias invalid -> invalid_tag (forum #477192) has been approved by @furrypickle.
Updated by auto moderator