The tag alias #77929 balls_from_back -> backsack has been approved.
Reason: This mistag cropped up recently and seems worth aliasing. This has the benefit of also catching potential future balls_from_behind since a user inputting balls_from_ would see the implication. There are also the untagged sack_from_back and ballsack_from_back, but those can be aliased later if they crop up.
Tag history:
https://e621.net/wiki_pages/2972
EDIT: The tag alias balls_from_back -> backsack (forum #456779) has been approved by @spe.
Updated by auto moderator