After running a data import, when planner move some tasks from the existing primary resource to a different resource, it creates duplicate tasks of the ones moved back onto the original primary resource and completes the dragged tasks that are now planned on a different resource.
The functionality has been enhanced with the JobCode being a internal reference and assign new op steps and job codes to unsolved duplicate tasks as opposed to raising an error. Please upgrade to Orchestrate version 7.66 or above