You just deleted a record with fixed values.
This script will only work if the EmployeeID='zeppelin' exists in
the Employees table. Otherwise you will get an error. Try to delete
the record a second time and you will see that it won't work.
However, you can insert the record back again and then this delete will
work again (the link to insert a single record with fixed values
will re-insert the record).
Please navigate back to the prior page.