Your default workstation is used when an item isn't assigned to a specific workstation. The first workstation you create is automatically set as the default. However, you can change this by following these instructions.
Step 1. Open your Delivery Manager App (DMA) and Tap on More.
Step 2. Tap on Settings.
Step 3. Tap on Workstations in the sidebar.
Step 4. Tap on the current default workstation to choose a different one.