1. Right-click the item you want deallocate, point to Links, point to Traceability, and then click Allocate To or Allocate From.
2. For each item you want to deallocate:
a. In the Linked Items pane, select the item you want to deallocate.
b. Click the Unlink button.
3. Click OK.
To allocate activity diagram items on an activity diagram:
If an Activity Diagram item has been allocated to a SysML item by moving the Activity Diagram item to within an Allocate Activity Partition, you can deallocate the Activity Diagram item by moving the Activity Diagram item to outside of the Allocate Activity Partition.