#19 Username must be unique

1.1.1
open
nobody
Database (7)
5
2008-07-14
2008-07-14
Benjamin Oshrin
No

When adding contacts correctly, a unique username must be provided due to the schema definition (and also the MySQL default implementation).

If a second contact is added with a blank username, the unhelpful message "duplicate key for field 3" is provided.

At a minimum, a better error message should be provided. Alternately, multiple blank username should be allowed.

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