I've got a Master-Detail edit page where the user can add and delete detail records.  One of the detail fields has a UNIQUE constraint on it. 
 
If I delete a detail record and then add a new one with the same unique key and save, it causes a constraint violation in the database.  Looking at the generated SQL, it is executing the INSERT before the DELETE, even though the delete happened first.  Why is this happening?
 
John
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