[SOLVED][LibGDX] Problem with removing and creating Bodies

I really didn’t find any suitable solution on the web for my particular problem.

I’m creating a game with LibGDX and run into problems when i try to create bodies. The Problem occurs quite randomly and i can’t track it down properly, but it seems it is only occuring when i create an Item from my Item class.

This is the error message:

http://pastebin.com/Qy0qaKBr

and this is the logfile created:

http://pastebin.com/jz6Tr6u5

As i read on some resources it seems like this error is caused when destroying a body while iterating over the bodylist. As i do not destroy bodies when this error happens its seems rather odd. Also i never figured out why the OpenAL library is involved here, as i don’t use any sounds yet…