Problem/Bug Strange crash on bukkit server

I got a random crash after I used "//move 1" with worldedit on a redstone machine I made on my bukkit server. The server crashed, and when I restart it, it runs fine until I try to join again and it crashes. This is the error I get every time:

https://pastebin.com/eyBrdnuL

Could this be from the redstone contraption I was working on? How can I fix this issue?

Thanks in advance for any help!