Found item.glow_stick.black.name in mansion chest

In the seed 12546250 

coordinate 6654 68 146

there is a mansion and you can find a chest

if you open it, you can find a unabled item

it is not a creative mode or education mode

its survival mode

the item's name is

 

item.glow_stick.black.name

 

i search for it and figure out that it is from the education mode

why is it in the world for survival and check it out please