What
A Purchase Order can be deleted, or be unassociated with a Placement record (without deleting it).
Where
Clients > Client record > Related tab > Purchase Orders
From here you can see the existing Purchase Orders. Click in the PO number you are looking to remove.
Delete a Purchase Order
From the Purchase Orders tab, click the blue tick-box of the order and click Delete Purchase Order.
Remove Association with a Placement
NOTE: The Purchase Order still exists in the Client record after removing it from a Placement, and can be used again if necessary.
From the Purchase Orders tab, click the blue tick-box of the order and click Edit. This will open the Purchase Order record.
Within the Purchase Order record, go to the Placements tab > click the blue tick-box of the order > click ⁝ (kebab menu) > Remove