The tag alias #69373 character_request -> unknown_character has been rejected.
Reason: Or reversed, either way, these tags refer to the same thing.
Characters that have a name but require identification.
This tag should be used if you know that the character is named but you can't recall it, or if you don't know their English name.
Posts with this tag include a character, or characters, whose name is possibly unknown to the uploader or any other user. This comes into use when a user may be able to identify the character(s) on display.
Personally I think the reverse would be better, but...
EDIT: The tag alias character_request -> unknown_character (forum #400842) has been rejected by @Nimphia.
Updated by auto moderator