Thank you for the explanation, David

On Thu, Feb 25, 2021 at 9:49 PM David Rowley <dgrowle...@gmail.com> wrote:

>
> Since your foreign keys perform a cascade delete on the tables
> referencing the tables you're deleting from, any records in those
> referencing tables will be deleted too.  You must also look at those
> referencing tables and see what references those and index the
> column(s) which are referencing.
>
>

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