What does the error message "Rear section-M7023-width-adjustable conveyor belt is not reset machine code" mean?

Why did the error code KM-ASSYH2-04 appear on the machine?

How can this error be resolved?
The solution to the error "Rear section-M7023-width-adjustable conveyor belt is not reset" involves disconnecting the conveyor belt and using a manual override to reset the tension system, then reconnecting