What is the Primary Key of the table/view?

>For testing (vfp7) I have a table (table buffered) with one char field and one integer field. The integer has a regular index. I create a view of this table, (the view is table buffered) and insert a record into the view.
>The view is updatable. I tableupdate the view after the insert. I then
>edit the same record (without a requery) (I change the char value) in the view and tableupdate again. The newly inserted view record is now marked as deleted. If I take the base table and remove the index from the integer field and repeat this process the record does not get marked deleted. What is going on?