Loading momentarily before upgrading an equipment

I saved right before some adorable settler picks a defensive helmet. Then, encountered this error after loading that save-game briefly. As far as I’m concerned, that is.

release-729 (x64)
Unknown C++ exception
stack traceback:
radiant/modules/common.lua:245: in function 'report_traceback’
radiant/modules/common.lua:256: in function <radiant/modules/common.lua:250>
[C]: in function ‘get’
…/upgrade_equipment/find_equipment_upgrade_action.lua:47: in function 'fn’
radiant/modules/events.lua:288: in function <radiant/modules/events.lua:285>
[C]: in function 'xpcall’
radiant/modules/common.lua:265: in function 'xpcall’
radiant/modules/events.lua:285: in function 'trigger’
radiant/modules/events.lua:370: in function '_fire_async_triggers’
radiant/modules/events.lua:445: in function '_update’
radiant/server.lua:61: in function <radiant/server.lua:58>

A post was merged into an existing topic: Error code when hearthling equipped weapon from Giant Zombie