To prevent offsetting or loss of assigned joins with the haul network, you can export the preassigned joins from the project and re-import them back after you make changes in the scheduler.
For this purpose, use Import/Export Joins button located in the top right corner of the Blocks panel.
To export Joins:
Go to the Network tab.
Open the Blocks tab (at the left bottom).
Locate Import/Export Joins button, as shown below.
Select “Export Joints” option.
In the Save As window specify a path relevant
Block Joins File will be saved in “.blockJoins” format.
To import Joins:
Go to the Network tab.
Open the Blocks tab (at the left bottom).
Locate Import/Export Joins button, as shown below.
Select “Import Joints” option.
In the Open window select relevant Block Joins File in “.blockJoins” format and press OK.