Possible Incompatibility with Ancient Warfare

[SwissChesse]

Describe the bug
A clear and concise description of what the bug is.
ConcurrentModificationException when generating structures from Ancient Warfare 2. Goes away when Food Funk is removed.
To Reproduce
Steps to reproduce the behavior:

1. Generate structures from Ancient Warfare 2, presumably those with food inside chests as not all structures cause a crash.
2. Game freezes and crashes to desktop

Logs
Attach the Minecraft latest.log from a session where you duplicate the bug. If the mod has a debugging config option, please enable debugging and restart Minecraft before generating the log.
crash-2021-05-11_18.38.56-server.txt
The log is critical - it contains the versions of the mod, Forge, and Minecraft being used in addition to other needed information.

Config files
Attach the configuration files related to this issue, usually foodfunk.cfg and wumpleutil.cfg at minimum.

foodfunk.txt
wumpleutil.txt

*Config files have been turned into txt files in order to paste.