Error while running event belt-balancer::on_robot_mined_entity (ID 65)
belt-balancer/objects/part.lua:253: attempt to index local 'belt' (a nil value)
stack traceback:
belt-balancer/objects/part.lua:253: in function 'remove'
belt-balancer/control.lua:165: in function <belt-balancer/control.lua:154>
