Please, see the attached image. The event won't allow me to re-assign the contractor.
You currently cannot reassign a contractor to the job if that job is already instructed.
In effect, the existing contractor has already received an email instructing them to do the job. It would be confusing if you could reassign the job without their knowledge.
You can however changed the assignee on an event which isn't yet instructed.
The Fixflo Support Team