lore tags can only be created by admins, so if anything go make of case of it here
https://e621.net/forum_topics/23515
Topic: why is the agender_(lore) tag aliased to invalid?
Posted under Tag Alias and Implication Suggestions
Yea, it's not aliased to invalid tag or anything, you're just being prevented from adding tags to the lore category.
Updated
It absolutely shouldnt be so. Yeah you should go to the lore tags thread for sure
tight, good to know
thanks yall