[1.7.10] Server crashes when an item tries to despawn

[plajdo]

The new 1.7.10 version works on server, but as soon as an item tries to despawn, it crashes the server and it cannot start again (it crashes as soon as it loads).

(I don't want to spam here, so I put the files on pastebin) Console log: https://pastebin.com/BWt1BkJp Crash report: https://pastebin.com/5a9k7Sr8

I hope you fix this issue soon, thanks.

• Plajdo