[BUG] Changing an Onsite Installation to a Remote Installation generates error

[danry25]

What is broken?
Changing an Onsite Installation to a Remote Installation shows an error and does not save:

Failed to update this order! 😠 The property 'ProductOrder.ProductOrderId' has a temporary value while attempting to change the entity's state to 'Deleted'. Either set a permanent value explicitly, or ensure that the database is configured to generate values for this property. at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.InternalEntryBase.SetEntityState(EntityState oldState, EntityState newState, Boolean acceptChanges, Boolean modifyProperties) at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.InternalEntityEntry.SetEntityState(EntityState entityState, Boolean acceptChanges, Boolean modifyProperties, Nullable1 forceStateWhenUnknownKey, Nullable1 fallbackState) at Microsoft.EntityFrameworkCore.ChangeTracking.EntityEntry.set_State(EntityState value) at Microsoft.EntityFrameworkCore.DbContext.Remove[TEntity](TEntity entity) at NumberSearch.Ops.Controllers.OrdersController.OrderUpdate(Order order) in /home/vsts/work/1/s/NumberSearch.Ops/Controllers/OrdersController.cs:line 525

To Reproduce
Steps to reproduce the behavior:

1. Go to a quote
2. Click on Onsite Installation toggle
3. Press green Update button
4. See error

Expected behavior
Changing the Onsite Installation toggle in Ops and pressing Update should save this as a Remote Installation.

Screenshots