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Support for fields additional to the group id will require quite a lot
of code. The tables are in place, but we need to get ready for a
release.

They are different each time.

The id fields may not be the same in the two databases.

Fixes #258.

Searches use upper to perform case-insensitive look ups.

The transaction can be rolled back on failure.

Remove logging statements.

Options to increment cache or increment only from isolates added today.