MySQL query giving duplicate entry error 1062

Question

Why is this query giving an error? The error is: SQL Error (1062): Duplicate entry '0' for key 'PRIMARY'

INSERT INTO `static_number_source` (`IDString`, `source`) VALUES
('RUS-001A', 'Thub'), #one
('RUS-001A', 'Fort'), #two
('RUS-002A', 'Thub'), #three
('RUS-002A', 'Fort'), #four
('RUS-003A', 'Thub'), #five
('RUS-003A', 'Fort'), #six
('RUS-004A', 'Thub'), #seven
('RUS-004A', 'Fort'); #eight

Answer 1

You can do either Alter the table to add AUTO_INCREMENT TO THE ID field, or always provide an Id on Inserts

For adding AUTO_INCREMENT just find the largest value of id in the table and set id it to one more.

Answer 2

IDString seem to be set as PRIMARY. PRIMARY must have unique value. If you want to use multiple value with the same value, use a regular non-unique INDEX.

By the way, if you have a UNIQUE index on both field, thoses are similar :

('RUS-002A', 'Fort'), #three
('RUS-002A', 'Fort'), #four