The Shipment::postDelete() method deletes the associated Shipping Profiles automatically. This is great except when the same profile is used for multiple Shipments.
Create an order with multiple order items and pack it to multiple Shipments. We do this through Commerce API + Custom Shipment Packer, but it can be done manually as well. Remove an order item from the order, which triggers repacking down to a single Shipment. The shipment related to the deleted order item is deleted, which then deletes the associated shipping profile. This breaks the still-existing shipment on the order due to it's now-missing profile.
Before deleting shipping profiles in Shipment::postDelete(), check for any other shipments in the system using the same profile.
See MR patch.
Active
2.0
Code