BUR #18209 has been approved by @nonamethanks.
rename lunch_box -> lunch_box_(manga)
create alias lunch_box -> lunchbox
There's an obscure manga named Lunch box, which is ambiguous with the existing lunchbox tag. So I suggest renaming the manga tag to add the qualifier and then apply "lunch_box" (with underscore) as an alias to the current lunchbox tag.
As a side note, after I've looked up a bit on the tag wiki pages for lunchbox and bento, I can't really see any difference except that bento tag is often used for any lunchbox with Japanese food in it, while the lunchbox tag itself also has a large number of posts with what would be otherwise tagged as bento (though I assumed that lunchbox is for any box that contains ready-to-eat food in it, as I have edited the wiki pages). So I'm thinking about merging these two tags, though I would like to hear from you guys first about this.
Updated