I don't have Terraria on Xbox one but.
Try upload your 360 world save to the Xbox one than upload your Xbox one save to the 360 (depending on if you have the Xbox one version of Terraria)
~but that's just a theory, a game theory~
[doublepost=1558774008,1558773962][/doublepost]^Don't know if this works but if it does let me know.